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Q: How did Reese eat her cereal?
A: Witherspoon.
* * *
Q: How many vampires are in this room?
A: I don't know, I cant Count Choculas.
* * *
Q: Did you hear about Tony The Tiger's murder?
A: Police suspect a cereal killer.
* * *
Q: What do snowmen eat for breakfast?
A: Frosted Flakes.
* * *
Q: What do you call a person that chops up cereal?
A: A cereal killer.
* * *
2465) Brainstem
Gist
The brainstem is the structure that connects the cerebrum of the brain to the spinal cord and cerebellum. It is composed of three sections in descending order: the midbrain, pons, and medulla oblongata.
The brainstem is the vital stalk-like structure connecting the cerebrum and cerebellum to the spinal cord, controlling essential life functions like breathing, heart rate, blood pressure, and consciousness, while also relaying sensory/motor signals and housing nuclei for most cranial nerves (III-XII). It's made of three parts—the midbrain, pons, and medulla oblongata—and is crucial for sleep, balance, swallowing, vision, hearing, and facial movement.
Summary
The brainstem (or brain stem) is the posterior stalk-like part of the brain that connects the cerebrum with the spinal cord. In the human brain, the brainstem is composed of the midbrain, the pons, and the medulla oblongata. The midbrain is continuous with the thalamus of the diencephalon through the tentorial notch, and sometimes the diencephalon is included in the brainstem.
The brainstem is very small, making up around only 2.6 percent of the brain's total weight. It has the critical roles of regulating heart and respiratory function, helping to control heart rate and breathing rate. It also provides the main motor and sensory nerve supply to the face and neck via the cranial nerves. Ten pairs of cranial nerves come from the brainstem. Other roles include the regulation of the central nervous system and the body's sleep cycle. It is also of prime importance in the conveyance of motor and sensory pathways from the rest of the brain to the body, and from the body back to the brain. These pathways include the corticospinal tract (motor function), the dorsal column-medial lemniscus pathway (fine touch, vibration sensation, and proprioception), and the spinothalamic tract (pain, temperature, itch, and crude touch).
Clinical significance
Diseases of the brainstem can result in abnormalities in the function of cranial nerves that may lead to visual disturbances, pupil abnormalities, changes in sensation, muscle weakness, hearing problems, vertigo, swallowing and speech difficulty, voice change, and co-ordination problems. Localizing neurological lesions in the brainstem may be very precise, although it relies on a clear understanding on the functions of brainstem anatomical structures and how to test them.
Brainstem stroke syndrome can cause a range of impairments including locked-in syndrome.
Duret haemorrhages are areas of bleeding in the midbrain and upper pons due to a downward traumatic displacement of the brainstem.
Cysts known as syrinxes can affect the brainstem, in a condition, called syringobulbia. These fluid-filled cavities can be congenital, acquired or the result of a tumor.
Criteria for claiming brainstem death in the UK have developed in order to make the decision of when to stop ventilation of somebody who could not otherwise sustain life. These determining factors are that the patient is irreversibly unconscious and incapable of breathing unaided. All other possible causes must be ruled out that might otherwise indicate a temporary condition. The state of irreversible brain damage has to be unequivocal. There are brainstem reflexes that are checked for by two senior doctors so that imaging technology is unnecessary. The absence of the cough and gag reflexes, of the corneal reflex and the vestibulo-ocular reflex need to be established; the pupils of the eyes must be fixed and dilated; there must be an absence of motor response to stimulation and an absence of breathing marked by concentrations of carbon dioxide in the arterial blood. All of these tests must be repeated after a certain time before death can be declared.
Details
Your brainstem connects your brain to your spinal cord. It sits at the bottom of your brain and includes the midbrain, pons and medulla oblongata. Your brainstem sends messages to the rest of your body to regulate balance, breathing, heart rate and more.
What is the brainstem?
Your brainstem connects your brain to your spinal cord. It sits near the bottom of your brain. It helps regulate vital body functions that you don’t have to think about, like breathing and your heart rate. Your brainstem also helps with your balance, coordination and reflexes.
It’s part of your central nervous system and has three parts that work together. Each part does a specific job to help you adapt to your environment, move and function.
Function:
What is the function of the brainstem?
Your brainstem sends messages back and forth between your brain and other parts of your body. It regulates many involuntary actions — functions your body performs automatically, like:
* Balance.
* Blood pressure.
* Breathing.
* Eye movements.
* Facial movements and sensations.
* Hearing.
* Heart rate.
* Sleep and wakefulness.
* Swallowing.
* Taste.
What are brainstem reflexes?
Brainstem reflexes are your body’s immediate and involuntary motor responses that help you survive and adapt to changes in your environment. You aren’t consciously thinking about performing these actions. Instead, your brainstem automatically tells your body to do them.
Brainstem reflexes include:
* Cardiovascular reflexes: A group of reflexes that regulate your heartbeat and blood pressure.
* Gag reflex: This reflex protects your airways.
* Swallowing reflex: This reflex moves food and liquids from your mouth to your stomach.
* Pupillary light reflex: This adjusts the size of your pupil (the black center of your eye) to adapt to lighting changes.
* Vestibulo-ocular reflex: This reflex steadies your eyes when you move your head or the rest of your body.
* Respiratory reflexes: A group of reflexes that regulate breathing, coughing and sneezing.
Anatomy:
Where is the brainstem located?
Your brainstem is located near the bottom of your brain, at the back of your skull. It connects your brain to your spinal cord.
What are the three parts of the brainstem?
Your brainstem is made up of three parts:
* Midbrain: The top part of your brainstem. The midbrain is involved in several functions, including motor control, particularly eye movements and processing of vision and hearing.
* Pons: The middle portion of your brainstem that coordinates face and eye movements, facial sensations, hearing and balance.
* Medulla oblongata: The bottom part of your brainstem that regulates your breathing, heartbeat, blood pressure and swallowing.
Your brainstem also contains your reticular activating system (RAS). The RAS is a network of neurons (nerve cells that carry electrical signals and chemicals through your brain). It works with your thalamus to manage your:
* Wakefulness (alertness).
* Awareness of your surroundings.
* Sleep and wake cycles.
Brainstem cranial nerves
Your brainstem contains 10 of the 12 cranial nerves (nerves that start in your brain) including cranial nerves 3 through 12. They help with your movements, sensations, taste and hearing.
What does the brainstem look like?
Your brainstem looks like a flower stalk or a stem of a plant. It’s a tube-like structure made of neural (or nervous system) tissue. It’s about 2 to 3 inches (5 to 7 centimeters) long.
Additional Information
Brainstem is area at the base of the brain that lies between the deep structures of the cerebral hemispheres and the cervical spinal cord and that serves a critical role in regulating certain involuntary actions of the body, including heartbeat and breathing. The brainstem is divided into three sections in humans: the midbrain (mesencephalon), the pons (metencephalon), and the medulla oblongata (myelencephalon).
The brainstem houses many of the control centres for vital body functions, such as swallowing, breathing, and vasomotor control. All of the cranial nerve nuclei, except those associated with olfaction and vision, are located in the brainstem, providing motor and sensory function to structures of the cranium, including the facial muscles, tongue, pharynx, and larynx, as well as supplying the senses of taste, equilibrium, and hearing. The brainstem also has nuclei important for sympathetic and parasympathetic autonomic functions. All efferent and afferent pathways between the cerebrum and cerebellum course through the brainstem, and many of them decussate, or cross, within this structure.
Because of the important neural structures concentrated in this small portion of the nervous system, even very small lesions of the brainstem may have profound effects. Speech disorders, vestibular disturbance, abnormal consciousness, dysphagia, and respiratory disturbance are a few examples of possible outcomes of brainstem disorders. Such disorders can be caused by trauma, tumours, strokes, infections, and demyelination (multiple sclerosis). Complete loss of brainstem function is regarded by some experts as equivalent to brain death.

Ventilator
Gist
A ventilator is a life-support machine that helps or takes over breathing for people who can't breathe adequately on their own, delivering oxygen to the lungs and removing carbon dioxide, used during surgery, severe illness (like pneumonia, COVID-19, COPD) or injury, and for long-term conditions, allowing the body to rest and heal. It acts as an "external set of lungs," supporting critical functions until the patient's own respiratory system recovers or for ongoing management.
You can be on a ventilator for a few hours (during surgery) to days, weeks, months, or even years, depending entirely on the reason you need it, with the goal always being to get you off as soon as your lungs are strong enough. Short-term use (days) is common for acute issues, while long-term (weeks/months/years) often involves a tracheostomy (neck tube) for chronic conditions or severe lung failure, like ARDS or muscle diseases.
Summary
Mechanical ventilators have played an important, if controversial, role in the treatment of patients with severe coronavirus disease 2019 (COVID-19)—helping critically ill persons breathe in the near term, but with potentially harmful trade-offs for lung function over the long term. For COVID-19 patients the possibility of long-term harm is only beginning to surface, raising questions about how ventilators work and why they pose a risk to patients.
Mechanical ventilators are automated machines that do the work of breathing for patients who are unable to use their lungs. Ventilators commonly are used when patients are experiencing severe shortness of breath, such as that caused by respiratory infection or by conditions such as chronic obstructive pulmonary disease (COPD). They may also be used in persons with traumatic brain injury or stroke, when the nervous system is no longer able to control breathing.
Ventilators work by delivering oxygen directly to the lungs, and they can also be programmed to pump out carbon dioxide for patients who are unable to exhale on their own. The ventilator delivers oxygen via a tube that is inserted through the patient’s nose or mouth in a procedure known as intubation or that is placed directly into the trachea, or windpipe, in a surgical procedure known as tracheostomy. The opposite end of the tube is connected to a machine (the ventilator) that pumps a mixture of air and oxygen through the tube and into the lungs. The air is warmed and humidified before it goes into the body. The ventilator further plays a vital role in maintaining positive air pressure to help prevent small air sacs (alveoli) in the lungs from collapsing.
Ventilators are set to pump air into the lungs a certain number of times per minute. The patient’s heart rate, respiratory rate, and blood pressure are monitored constantly. Doctors and nurses use this information to maths the patient’s health and to make necessary adjustments to the ventilator. When a patient shows signs of recovery from infection or injury, the doctor may decide to begin the process of ventilator weaning, a trial in which the patient is given a chance to breathe on his or her own but is still connected to the ventilator in case it is needed. Once a patient is weaned from the ventilator, the breathing tube is removed.
Ventilators are not cures for infection, and their use poses serious risks to patients. While on a ventilator, patients are unable to cough and clear potentially infectious agents from their airways. As a result, some patients develop ventilator-associated pneumonia, in which bacteria enter the lungs. Sinus infections can also occur. Other problems include oxygen toxicity and excess air pressure, which can cause significant damage to lung tissue. In addition, the longer a person is on a ventilator, the greater the degree of respiratory muscle atrophy that will occur. This can make it difficult for patients to breathe on their own. Activities like climbing stairs or even walking short distances may become impossible, resulting in long-term disability and reduced quality of life.
Details
A ventilator is a type of breathing apparatus, a class of medical technology that provides mechanical ventilation by moving breathable air into and out of the lungs, to deliver breaths to a patient who is physically unable to breathe, or breathing insufficiently. Ventilators may be computerized microprocessor-controlled machines, but patients can also be ventilated with a simple, hand-operated bag valve mask. Ventilators are chiefly used in intensive-care medicine, home care, and emergency medicine (as standalone units) and in anesthesiology (as a component of an anesthesia machine).
Ventilators are sometimes called "respirators", a term commonly used for them in the 1950s (particularly the "Bird respirator"). However, contemporary medical terminology uses the word "respirator" to refer to a face-mask that protects wearers against hazardous airborne substances.
Function
In its simplest form, a modern positive pressure ventilator, consists of a compressible air reservoir or turbine, air and oxygen supplies, a set of valves and tubes, and a disposable or reusable "patient circuit". The air reservoir is pneumatically compressed several times a minute to deliver room-air, or in most cases, an air/oxygen mixture to the patient. If a turbine is used, the turbine pushes air through the ventilator, with a flow valve adjusting pressure to meet patient-specific parameters. When over pressure is released, the patient will exhale passively due to the lungs' elasticity, the exhaled air being released usually through a one-way valve within the patient circuit called the patient manifold.
Ventilators may also be equipped with monitoring and alarm systems for patient-related parameters (e.g., pressure, volume, and flow) and ventilator function (e.g., air leakage, power failure, mechanical failure), backup batteries, oxygen tanks, and remote control. The pneumatic system is nowadays often replaced by a computer-controlled turbopump.
Ventilator pressures labeled
Modern ventilators are electronically controlled by a small embedded system to allow exact adaptation of pressure and flow characteristics to an individual patient's needs. Fine-tuned ventilator settings also serve to make ventilation more tolerable and comfortable for the patient. In Canada and the United States, respiratory therapists are responsible for tuning these settings, while biomedical technologists are responsible for the maintenance. In the United Kingdom and Europe the management of the patient's interaction with the ventilator is done by critical care nurses.
The patient circuit usually consists of a set of three durable, yet lightweight plastic tubes, separated by function (e.g. inhaled air, patient pressure, exhaled air). Determined by the type of ventilation needed, the patient-end of the circuit may be either noninvasive or invasive.
Noninvasive methods, such as continuous positive airway pressure (CPAP) and non-invasive ventilation, which are adequate for patients who require a ventilator only while sleeping and resting, mainly employ a nasal mask. Invasive methods require intubation, which for long-term ventilator dependence will normally be a tracheotomy cannula, as this is much more comfortable and practical for long-term care than is larynx or nasal intubation.
Safety-critical system
As failure may result in death, mechanical ventilation systems are classified as safety-critical systems, and precautions must be taken to ensure that they are highly reliable, including their power supply. Ventilatory failure is the inability to sustain a sufficient rate of CO2 elimination to maintain a stable pH without mechanical assistance, muscle fatigue, or intolerable dyspnea. Mechanical ventilators are therefore carefully designed so that no single point of failure can endanger the patient. They may have manual backup mechanisms to enable hand-driven respiration in the absence of power (such as the mechanical ventilator integrated into an anaesthetic machine). They may also have safety valves, which open to atmosphere in the absence of power to act as an anti-suffocation valve for spontaneous breathing of the patient. Some systems are also equipped with compressed-gas tanks, air compressors or backup batteries to provide ventilation in case of power failure or defective gas supplies, and methods to operate or call for help if their mechanisms or software fail. Power failures, such as during a natural disaster, can create a life-threatening emergency for people using ventilators in a home care setting. Battery power may be sufficient for a brief loss of electricity, but longer power outages may require going to a hospital.
Additional Information
A ventilator, sometimes called a mechanical ventilator, is a machine that helps you breathe when you're sick, injured, or sedated for an operation. It pumps oxygen-rich air into your lungs. It also helps you breathe out carbon dioxide, a harmful waste gas your body needs to get rid of.
Even while they help you breathe, ventilators sometimes lead to complications. These problems can result from the ventilator itself, or from things that are more likely to happen when you're on a ventilator.
Ventilator vs. respirator
People sometimes use the word respirator to mean the same thing as ventilator. The CDC defines a respirator as a mask or device that protects you from dangerous particles in the air. But a respirator can also describe a device that helps you breathe, like a ventilator.
Ventilator vs. intubation
Ventilators and intubation are often used together, but they aren't the same. Intubation is a procedure in which a health care worker places a tube down your throat to move air in and out of your lungs. This tube can then be hooked up to a bag or a ventilator machine.
Types of Ventilators
There are several types of ventilation. Your doctor will determine which is best for your situation.
1. Noninvasive ventilation
Noninvasive ventilation involves using a face mask that connects to the ventilator. You breathe into the mask, which straps around your head. Two common noninvasive ventilation devices are continuous positive airway pressure (CPAP) and bilevel positive airway pressure (BiPAP) machines, both used by people with sleep apnea.
2. Invasive ventilation
With invasive ventilation, you have a tube in your airway that connects to a ventilator machine. The tube can either enter through your mouth (intubation) or through an incision a doctor cuts into your neck (tracheostomy).
3. Mechanical ventilator
A mechanical ventilator is a machine that keeps your airways open and delivers oxygen to help you breathe. It's considered a form of life support.
4. Face mask ventilator
A face mask ventilator is a form of noninvasive ventilation. It essentially means you wear a face mask to get oxygen. It may be used to deliver anesthesia as well as to help you breathe.
5. Manual resuscitator bag
A manual resuscitator bag provides air by hand. Someone pumps the bag to help air go in and out of your lungs. The bag can attach to a face mask ventilator or a tube if you're intubated. This may be an option if a mechanical ventilator isn't available or stops working.
6. Tracheostomy ventilator
With a tracheostomy ventilator, the machine attaches to a tube that doctors have inserted into an opening in your neck.
How Does a Ventilator Work?
A ventilator connects to a face mask or to a tube in your nose, mouth, or throat. It blows oxygen-rich air into your windpipe through the tube. Before it travels to your windpipe, the air passes through a humidifier, which keeps it warm and moist. The ventilator may also breathe out for you, or you may do it on your own.
The machine maintains a constant low pressure to prevent the air sacs in your lungs from collapsing.
The ventilator can be set to take a certain number of breaths for you per minute. Your doctor also may program it to kick in when you need help. In this case, the machine will blow air into your lungs automatically if you haven't taken a breath in a set amount of time.

Collected and Collecting Quotes
1. When I was a kid, when I was 16, 17, I'd come home from high school, and my dad collected all of Barbra Streisand's records. And she was very young then. I think she probably had three records out, and she was 21, and we had them all. And I knew every single song, every breath, every elision, every swell. And I sang along to it. - Meryl Streep
2. As more and more money is coming into the formal economy, one can look at more attractive tax rates and lower tax slabs. Even if half the people who were in the informal sector move in to the formal economy and more taxes get collected, more money can be spent on the welfare. - Piyush Goyal
3. In science there is only physics; all the rest is stamp collecting. - Lord Kelvin
4. Collecting more taxes than is absolutely necessary is legalized robbery. - Calvin Coolidge
5. It only stands to reason that where there's sacrifice, there's someone collecting the sacrificial offerings. Where there's service, there is someone being served. The man who speaks to you of sacrifice is speaking of slaves and masters, and intends to be the master. - Ayn Rand
6. Collecting is my passion. - Ursula Andress
7. One of the things I have been preaching around the world is collecting taxes in an equitable manner, especially from the elites. - Hillary Clinton
8. I actually like snakes! When I was young, I was a boy scout nature camp counselor, and one of our projects was collecting snakes and creating an environment for them, so I'm quite familiar with snakes and think they're fantastic creatures. - Harrison Ford.
2464) Canada - The Country With The Longest Coastline In The World
Gist
While the common name is simply Canada, its historical full name, used at Confederation in 1867, was the Dominion of Canada, a term dropped from official use with the Canada Act in 1982, though it's still sometimes referenced. Today, "Canada" is the legal name, reflecting its status as a sovereign nation, constitutional monarchy, and parliamentary democracy.
Is Canada a good place to live?
Yes, Canada is widely considered a very good place to live due to its high quality of life, safety, strong social programs (like universal healthcare and education), multiculturalism, and abundant natural beauty, but it comes with challenges like high living costs in major cities, long winter seasons, and potential integration difficulties for newcomers.
Summary
Canada, is the second largest country in the world in area (after Russia), occupying roughly the northern two-fifths of the continent of North America.
Despite Canada’s great size, it is one of the world’s most sparsely populated countries. This fact, coupled with the grandeur of the landscape, has been central to the sense of Canadian national identity, as expressed by the Dublin-born writer Anna Brownell Jameson, who explored central Ontario in 1837 and remarked exultantly on “the seemingly interminable line of trees before you; the boundless wilderness around you; the mysterious depths amid the multitudinous foliage, where foot of man hath never penetrated…the solitude in which we proceeded mile after mile, no human being, no human dwelling within sight.” Although Canadians are comparatively few in number, they have crafted what many observers consider to be a model multicultural society, welcoming immigrant populations from every other continent. In addition, Canada harbours and exports a wealth of natural resources and intellectual capital equaled by few other countries.
Canada is officially bilingual in English and French, reflecting the country’s history as ground once contested by two of Europe’s great powers. The word Canada is derived from the Huron-Iroquois kanata, meaning a village or settlement. In the 16th century, French explorer Jacques Cartier used the name Canada to refer to the area around the settlement that is now Quebec city. Later, Canada was used as a synonym for New France, which, from 1534 to 1763, included all the French possessions along the St. Lawrence River and the Great Lakes. After the British conquest of New France, the name Quebec was sometimes used instead of Canada. The name Canada was fully restored after 1791, when Britain divided old Quebec into the provinces of Upper and Lower Canada (renamed in 1841 Canada West and Canada East, respectively, and collectively called Canada). In 1867 the British North America Act created a confederation from three colonies (Nova Scotia, New Brunswick, and Canada) called the Dominion of Canada. The act also divided the old colony of Canada into the separate provinces of Ontario and Quebec. Dominion status allowed Canada a large measure of self-rule, but matters pertaining to international diplomacy and military alliances were reserved to the British crown. Canada became entirely self-governing within the British Empire in 1931, though full legislative independence was not achieved until 1982, when Canada obtained the right to amend its own constitution.
Canada shares a 5,525-mile- (8,890-km-) long border with the United States (including Alaska)—the longest border in the world not patrolled by military forces—and the overwhelming majority of its population lives within 185 miles (300 km) of the international boundary. Although Canada shares many similarities with its southern neighbour—and, indeed, its popular culture and that of the United States are in many regards indistinguishable—the differences between the two countries, both temperamental and material, are profound. “The central fact of Canadian history,” observed the 20th-century literary critic Northrop Frye, is “the rejection of the American Revolution.” Contemporary Canadians are inclined to favour orderly central government and a sense of community over individualism; in international affairs, they are more likely to serve the role of peacemaker instead of warrior, and, whether at home or abroad, they are likely to have a pluralistic way of viewing the world. More than that, Canadians live in a society that in most legal and official matters resembles Britain—at least in the English-speaking portion of the country. Quebec, in particular, exhibits French adaptations: more than three-fourths of its population speaks French as their primary language. The French character in Quebec is also reflected in differences in religion, architecture, and schooling. Elsewhere in Canada, French influence is less apparent, confined largely to the dual use of French and English for place names, product labels, and road signs. The French and British influences are supplemented by the cultures of the country’s Native American peoples (in Canada often collectively called the First Nations) and Inuit peoples, the former being far greater in number and the latter enjoying semiautonomous status in Canada’s newest territory, Nunavut. In addition, the growing number of immigrants from other European countries, Southeast Asia, and Latin America has made Canada even more broadly multicultural.
Canada has been an influential member of the Commonwealth and has played a leading role in the organization of French-speaking countries known as La Francophonie. It was a founding member of the United Nations and has been active in a number of major UN agencies and other worldwide operations. In 1989 Canada joined the Organization of American States and signed a free trade agreement with the United States, a pact that was superseded in 1992 by the North American Free Trade Agreement (which also includes Mexico). A founding member (1961) of the Organisation for Economic Co-operation and Development, Canada is also a member of the Group of Seven (G7), which includes the world’s seven largest industrial democracies and, as the Group of Eight (G8), had included Russia until it was indefinitely suspended from membership in 2014.
The national capital is Ottawa, Canada’s fourth largest city. It lies some 250 miles (400 km) northeast of Toronto and 125 miles (200 km) west of Montreal, respectively Canada’s first and second cities in terms of population and economic, cultural, and educational importance. The third largest city is Vancouver, a centre for trade with the Pacific Rim countries and the principal western gateway to Canada’s developing interior. Other major metropolitan areas include Calgary and Edmonton, Alberta; Quebec city, Quebec; and Winnipeg, Manitoba.
Details
Canada is a country in North America. Its ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the second-largest country by total area, with the longest coastline of any country. Its border with the United States is the longest international land border. The country is characterized by a wide range of both meteorologic and geological regions. With a population of over 41 million, it has widely varying population densities, with the majority residing in its urban areas and large areas being sparsely populated. Canada's capital is Ottawa and its three largest metropolitan areas are Toronto, Montreal, and Vancouver.
Indigenous peoples have continuously inhabited what is now Canada for thousands of years. Beginning in the 16th century, British and French expeditions explored and later settled along the Atlantic coast. As a consequence of various armed conflicts, France ceded nearly all of its colonies in North America in 1763. In 1867, with the union of three British North American colonies through Confederation, Canada was formed as a federal dominion of four provinces. This began an accretion of provinces and territories resulting in the displacement of Indigenous populations, and a process of increasing autonomy from the United Kingdom. This increased sovereignty was highlighted by the Statute of Westminster, 1931, and culminated in the Canada Act 1982, which severed the vestiges of legal dependence on the Parliament of the United Kingdom.
Canada is a parliamentary democracy and a constitutional monarchy in the Westminster tradition. The country's head of government is the prime minister, who holds office by virtue of their ability to command the confidence of the elected House of Commons and is appointed by the governor general, representing the monarch of Canada, the ceremonial head of state. The country is a Commonwealth realm and is officially bilingual (English and French) in the federal jurisdiction. It is very highly ranked in international measurements of government transparency, quality of life, economic competitiveness, innovation, education and human rights. It is one of the world's most ethnically diverse and multicultural nations, the product of large-scale immigration. Canada's long and complex relationship with the United States has had a significant impact on its history, economy, and culture.
A developed country, Canada has a high nominal per capita income globally and its advanced economy ranks among the largest in the world by nominal GDP, relying chiefly upon its abundant natural resources and well-developed international trade networks. Recognized as a middle power, Canada's support for multilateralism and internationalism has been closely related to its foreign policies of peacekeeping and aid for developing countries. Canada promotes its domestically shared values through participation in multiple international organizations and forums.
Geography
By total area (including its waters), Canada is the second-largest country. By land area alone, Canada ranks fourth, due to having the world's largest area of fresh water lakes. Stretching from the Atlantic Ocean in the east, along the Arctic Ocean to the north, and to the Pacific Ocean in the west, the country encompasses 9,984,670 square kilometres (3,855,100 sq mi) of territory. Canada also has vast maritime terrain, with the world's longest coastline of 243,042 kilometres (151,019 mi). In addition to sharing the world's largest land border with the United States—spanning 8,891 kilometres (5,525 mi)—Canada shares a land border with Greenland (and hence the Kingdom of Denmark) to the northeast, on Hans Island, and a maritime boundary with France's overseas collectivity of Saint Pierre and Miquelon to the southeast. Canada is also home to the world's northernmost settlement, Canadian Forces Station Alert, on the northern tip of Ellesmere Island—latitude 82.5°N—which lies 817 kilometres (508 mi) from the North Pole. In latitude, Canada's most northerly point of land is Cape Columbia in Nunavut at 83°6′41″N, with its southern extreme at Middle Island in Lake Erie at 41°40′53″N. In longitude, Canada's land extends from Cape Spear, Newfoundland, at 52°37'W, to Mount St. Elias, Yukon Territory, at 141°W.
Canada can be divided into seven physiographic regions: the Canadian Shield, the Interior Plains, the Great Lakes–St. Lawrence Lowlands, the Appalachian region, the Western Cordillera, Hudson Bay Lowlands, and the Arctic Archipelago. Boreal forests prevail throughout the country, ice is prominent in northern Arctic regions and through the Rocky Mountains, and the relatively flat Canadian Prairies in the southwest facilitate productive agriculture. The Great Lakes feed the St. Lawrence River (in the southeast) where the lowlands host much of Canada's economic output. Canada has over 2,000,000 lakes—563 of which are larger than 100 square kilometres (39 sq mi)—containing much of the world's fresh water. There are also fresh-water glaciers in the Canadian Rockies, the Coast Mountains, and the Arctic Cordillera. Canada is geologically active, having many earthquakes and potentially active volcanoes.
Climate
Average winter and summer high temperatures across Canada vary from region to region. Winters can be harsh in many parts of the country, particularly in the interior and Prairie provinces, which experience a continental climate, where daily average temperatures are near −15 °C (5 °F), but can drop below −40 °C (−40 °F) with severe wind chills. In non-coastal regions, snow can cover the ground for almost six months of the year, while in parts of the north snow can persist year-round. Coastal British Columbia has a temperate climate, with a mild and rainy winter. On the east and west coasts, average high temperatures are generally in the low 20s °C (70s °F), while between the coasts, the average summer high temperature ranges from 25 to 30 °C (77 to 86 °F), with temperatures in some interior locations occasionally exceeding 40 °C (104 °F).
Much of Northern Canada is covered by ice and permafrost. The future of the permafrost is uncertain because the Arctic has been warming at three times the global average as a result of climate change in Canada. Canada's annual average temperature over land has risen by 1.7 °C (3.1 °F), with changes ranging from 1.1 to 2.3 °C (2.0 to 4.1 °F) in various regions, since 1948. The rate of warming has been higher across the North and in the Prairies. In the southern regions of Canada, air pollution from both Canada and the United States—caused by metal smelting, burning coal to power utilities, and vehicle emissions—has resulted in acid rain, which has severely impacted waterways, forest growth, and agricultural productivity. Canada is one of the largest greenhouse gas emitters globally, with emissions increased by 16.5 percent between 1990 and 2022.
Additional Information
Canada is a vast and rugged land. From north to south it spans more than half the Northern Hemisphere. From east to west it stretches almost 4,700 miles (7,560 kilometers) across six time zones. It is the second largest country in the world, but it has only one-half of one percent of the world's population.
Canada features black-blue lakes, numerous rivers, majestic western mountains, rolling central plains, and forested eastern valleys. The Canadian Shield, a hilly region of lakes and swamps, stretches across northern Canada and has some of the oldest rocks on Earth.
Canada's far north lies in the frozen grip of the Arctic, where ice, snow, and glaciers dominate the landscape. Few trees grow here, and farming is not practical. Native Canadians, called First Nations people, live in this region by hunting and fishing.
Canada's remote north and extensive forests are home to wildlife, from bears, wolves, beavers, deer, mountain lions, and bighorn sheep to smaller animals like raccoons, otters, and rabbits. The country's lakes and rivers, which contain about 20 percent of all fresh water on Earth, are full of fish such as trout and salmon.
Canada's prairies in the south are home to bison and pronghorn antelope. Farther north are Canada's sprawling evergreen forests, which have lots of wildlife, including moose and black bears. Even farther north is the cold, bare tundra, where herds of caribou and musk ox live.
Canadians work hard to protect the native wildlife. Canada has 41 national parks and three marine conservation areas. Nevertheless, species like wolves, lynx, and Atlantic fish have been overhunted and overfished.

2463) Flight Data Recorder
Gist
A flight data recorder (FDR), part of the "black box," is a rugged device that records crucial aircraft operational data (altitude, speed, heading, etc.) and audio (CVR) for accident investigation, designed to survive extreme impacts, heat, and water to help determine crash causes and improve aviation safety, with modern units capturing 25+ hours of info in bright orange, crash-survivable casings with locator beacons.
A flight data recorder (FDR; also ADR, for accident data recorder) is an electronic device employed to record instructions sent to any electronic systems on an aircraft. The data recorded by the FDR are used for accident and incident investigation.
Summary
A flight recorder is an electronic recording device placed in an aircraft for the purpose of facilitating the investigation of aviation accidents and incidents. The device may be referred to colloquially as a "black box", an outdated name which has become a misnomer because they are required to be painted bright orange, to aid in their recovery after accidents.
There are two types of flight recording devices: the flight data recorder (FDR) preserves the recent history of the flight by recording of dozens of parameters collected several times per second; the voice recorder (CVR) preserves the recent history of the sounds in the math, including the conversation of the pilots. The two devices may be combined into a single unit. Together, the FDR and CVR document the aircraft's flight history, which may assist in any later investigation.
The two flight recorders are required by the International Civil Aviation Organization to be capable of surviving conditions likely to be encountered in a severe aircraft accident. They are specified to withstand an impact of 3400 g and temperatures of over 1,000 °C (1,830 °F) by EUROCAE ED-112. They have been a mandatory requirement in commercial aircraft in the United States since 1967. After the unexplained disappearance of Malaysia Airlines Flight 370 in 2014, commentators have called for live streaming of data to the ground, as well as extending the battery life of the underwater locator beacons.
Details
Flight Data Recorder (FDR) - device used to record specific aircraft performance parameters. The purpose of an FDR is to collect and record data from a variety of aircraft sensors onto a medium designed to survive an accident.
An FDR has historically been one of two types of "flight recorder" carried on aircraft, the other being a math voice recorder (CVR). Where both types of recorder are fitted, they are now sometimes combined into a single unit (ICAO Definition: Combination recorders). Combination recorders need to meet the flight recorder equipage requirements as specifically detailed in ICAO Annex 6 - Operation of Aircraft.
These combination recorders are sometimes referred to as Digital Voice and Data Recorders (DVDR). Some models originally recorded 25 hours of flight data and two hours of audio. However, rules adopted by the International Civil Aviation Organisation (ICAO) and the European Union Aviation Safety Agency (EASA) require 25 hours of audio for commercial aircraft with a maximum takeoff weight of 27,000 kg (60,000 lbs) or more, manufactured after January 1, 2021.
Some regulators require a minimum of two DVDRs. For example, U.S. Federal Aviation Administration (FAA) regulations state: "Two separate recorders are required for airplanes. Therefore, a single combination CVR/DFDR may not serve as both the required DFDR and the required CVR." However, the FAA allows one combination unit on rotorcraft, as long as no single electrical failure can disable both the CVR and DFDR functions. The FAA also plans a 25-hour CVR requirement.
Other ICAO Requirements
According to the provisions in ICAO Annex 6 - Operation of Aircraft, Vol 1 and Vol. III, a Type I FDR shall shall record the parameters required to determine accurately the aeroplane flight path, speed, attitude, engine power, configuration and operation. Types II and IIA FDRs shall record the parameters required to determine accurately the aeroplane flight path, speed, attitude, engine power and configuration of lift and drag devices.
The detailed list of parameters to be recorded by FDRs is provided in section 6.3 “Flight recorders” and at Attachement D to Annex 6, Vol. I. Furthermore, provisions in section 6.3 specify the aircraft equipage requirements depending on the maximum certificated takeoff mass and the date of first issue of the individual certificate of airworthiness. For example, provision 6.3.6 of Annex 6, Vol. I states that, all aeroplanes of a maximum certificated takeoff mass of over 5,700 kg for which the individual certificate of airworthiness is first issued after 1 January 2005 shall be equipped with a Type IA FDR.
According to ICAO SARPS, combination recorders (FDR/CVR) can only be used to meet the flight recorder equipage requirements as specifically indicated in ICAO Annex 6 (Vol I and Vol III, Attachment D).
Annex 6 amendments that took effect in 2019 state that FDR and CVR data may be used only for safety-related purposes with appropriate safeguards, and for criminal proceedings.
Other FAA Requirements
U.S. Federal Aviation Administration (FAA) requirements regarding FDRs for transport category aircraft include the following provisions:
* The FDR receives electrical power from a bus that provides maximum reliability without jeopardising service to essential or emergency loads.
* The FDR remains powered for as long as possible without jeopardising emergency operation of the airplane.
* There is an aural or visual means for preflight checking of the recorder for proper recording of data in the storage medium.
* Any single electrical failure does not disable both the FDR and the CVR.
* Each recorder must be bright orange or bright yellow, must have reflective tape attached, and have an underwater locating device.
* The FDR is supplied with flight data that meets specified accuracy requirements.
Objective
The recorder is installed in the most crash survivable part of the aircraft, usually the tail section. The data collected in the FDR system can help investigators determine whether an accident was caused by pilot error, by an external event (such as windshear), or by an airplane system problem. Furthermore, these data have contributed to airplane system design improvements and the ability to predict potential difficulties as airplanes age. An example of the latter is using FDR data to monitor the condition of a high-hours engine. Evaluating the data could be useful in making a decision to replace the engine before a failure occurs.
Additional Information
A flight recorder is an instrument that records the performance and condition of an aircraft in flight. Governmental regulatory agencies require these devices on commercial aircraft to make possible the analysis of crashes or other unusual occurrences. Flight recorders actually consist of two functional devices, the flight data recorder (FDR) and the voice recorder (CVR), though sometimes these two devices are packaged together in one combined unit. The FDR records many variables, not only basic aircraft conditions such as airspeed, altitude, heading, vertical acceleration, and pitch but also hundreds of individual instrument readings and internal environmental conditions. The CVR records verbal communication between crew members within the aircraft’s math as well as voice transmissions by radio. Aircraft sounds audible in the math are also caught on the recorder. Flight recorders are commonly carried in the tail of the aircraft, which is usually the structure that is subject to the least impact in the event of a crash. In spite of the popular name black box, flight recorders are painted a highly visible vermilion colour known as “international orange.”
The voice and instrument data processed by the flight recorder are stored in digital format on solid-state memory boards. At least 2 hours of math sound and up to 25 hours of flight data are stored, new data continuously replacing the old. The memory boards are housed within a box or cylinder called the crash-survivable memory unit. This is the only truly survivable component of the flight recorder; the other components, such as the data processor, are not necessary for retrieval of data. Consisting of a heavy stainless steel shell wrapped within layers of insulating material and covered by an aluminum housing, a memory unit is expected to survive impacts of 3,400 g (units of gravitational acceleration), flame temperatures as high as 1,100 °C (2,000 °F), and pressures encountered at 6,000 metres (20,000 feet) underwater. In the event of a crash at sea, flight recorders are equipped with a sonar device that is designed to emit an ultrasonic locator signal for at least 30 days.
In 1939 French engineers François Hussenot and Paul Beaudouin invented a flight recorder, the “type HB” (later called the “hussenograph”), that recorded altitude and speed information on a piece of photographic film. During World War II, analyzing crashes of military aircraft became important. In the United Kingdom, engineers Len Harrison and Vic Husband developed a system that recorded aircraft data on copper foil and could survive a crash. In Finland, engineer Veijo Hietala in 1942 developed a unit nicknamed the “Mata-Hari” that recorded test-flight data on photosensitive paper, which sometimes survived a crash. The U.S. Army Air Forces experimented with recording math voice data on a magnetic wire.
As civil aviation developed in the years after World War II, “crash-survivable” flight recorders came to be seen as a valuable tool in analyzing aviation disasters and contributing to the design of safer aircraft. However, truly serviceable flight recorders that had any chance of surviving plane crashes were not produced until several years after the war. A series of disastrous crashes of De Havilland Comet jetliners in 1953–54 spurred David Warren, a scientist at Australia’s Aeronautical Research Laboratory (ARL), to design the first combined FDR and CVR. The recording medium for Warren’s ARL Flight Memory Unit was steel wire of the type then being used in magnetic audio recorders. Warren’s invention became the basis for subsequent flight recorders. Although Warren’s recorder, as produced commercially by S. Davall & Son beginning in 1960, was housed in an egg-shaped casing that was painted red, the term black box, which arose during World War II as slang for sensitive aircraft components that were encased in black metal boxes, was applied to the device.
Parallel developments occurred elsewhere in the world. In the United States, James J. Ryan, an engineer employed by General Mills, in 1953 developed the VGA Flight Recorder, which sensed changes in velocity (V), gravitational forces (G), and altitude (A) and inscribed the measurements on a slowly moving strip of aluminum foil. As released in 1953 and sold by General Mills to the Lockheed Aircraft Company, the entire apparatus was enclosed in a yellow-painted spherical shell. Numerous other devices were produced employing various recording media, from metal strips to, eventually, magnetic tape.
During the 1960s, crash-protected FDRs and CVRs became mandatory on airliners around the world. Most flight recorders employed magnetic tape, but during the 1990s a great advancement came with the advent of solid-state memory devices. Memory boards are more survivable than recording tape, and the data stored on them can be retrieved quickly by a computer carrying the proper software. A complete picture can be created of conditions on the aircraft during the recorded period, including a computer-animated diagram of the aircraft’s positions and movements. Verbal exchanges and math sounds retrieved from CVR data are transcribed into documents that are made available to investigators along with the actual recordings. The release of these materials to the public is strictly regulated.

Collect Quotes - II
1. I love inventing names, but I also collect unusual names, so that I can look through my notebook and choose one that suits a new character. - J. K. Rowling
2. I have no problem with commitment - you can't have a real relationship without it. I can flip on a switch in my brain, and even if the next Brad Pitt is standing next to me, I won't look at him. But I can also turn that switch off, and then I collect attractive boys. - Megan Fox
3. I am what we call a 'karma yogi' in Sanskrit. A karma yogi is somebody who believes in data. I collect a lot of data. - N. R. Narayana Murthy
4. We have to keep our feet on ground, stay humble, and collect all praise, well-wishes, and prayers because these will help us in future. - Inzamam-ul-Haq
5. When I was a youngster, we did not have access to handpumps, so we used to collect buckets of water from the well and over time I was used to carry a lot of buckets. I also played a lot of Kabaddi and my thighs are really powerful because I used to pedal 25 kilometres every day, which assisted me in the movie 'Dharam Veer.' - Dharmendra.
Hi,
#9824.
Hi,
#6318.
Hi,
2673.
Q: What is a cheerleader's favorite cereal?
A: Cheerios.
* * *
Q: Why does a Northwestern Wildcats fan pour his cereal on a plate?
A: He lost his bowls.
* * *
Q: What do you call a person who opens 3 different boxes of cereal at once?
A: A cereal adulterer.
* * *
Q: How does Salvador Dali start his mornings?
A: With a bowl of "Surreal".
* * *
Q: What do cats eat for breakfast?
A: Mice Krispies.
* * *
Collect Quotes - I
1. We shall heal our wounds, collect our dead and continue fighting. - Mao Zedong
2. My only saving grace is that I actually collect things that nobody else is interested in. - Phil Collins
3. But in truth, should I meet with gold or spices in great quantity, I shall remain till I collect as much as possible, and for this purpose I am proceeding solely in quest of them. - Christopher Columbus
4. Unlike my opponent, I will not let oil companies write this country's energy plan, or endanger our coastlines, or collect another $4 billion in corporate welfare from our taxpayers. - Barack Obama
5. If you find a solution with the Cube, it doesn't mean you find everything. It's only a starting point. You can work on and find something else: you can improve your solution, you can make it shorter, you can go deeper and deeper and collect knowledge and many other things. - Erno Rubik
6. For many years I enjoyed the pleasure of cruising on my yacht all summer long and these were my best holidays. In mid-May, we'd start in St Tropez. I'd collect my bikinis from my home there and then we'd go up to Cannes for the Film Festival, on to Monte Carlo for the Grand Prix and then to Italy. - Ivana Trump
7. I'm very sensitive to the English language. I studied the dictionary obsessively when I was a kid and collect old dictionaries. Words, I think, are very powerful and they convey an intention. - Drew Barrymore
8. Even if you have $20,000 to buy an item, you still try to get a good price at antique stores. I collect furniture, rugs, paintings, frames. It's my hobby to go around to shops and markets. - Ursula Andress.
Q. Where do cauliflowers hang out?
A. In the Gobi desert.
* * *
Q: What happened to the vegetable on the street corner?
A: She was arrested for being a Cauli-girl.
* * *
Q: Where did the cauliflower go to have a few drinks?
A: The Salad Bar!
* * *
A guy walks into the doctor's office.
A banana stuck in one of his ears, a cauliflower in the other ear, and a carrot stuck in one nostril.
The man says, "Doc, this is terrible. What's wrong with me?"
The doctor says, "Well, first of all, you need to eat more sensibly."
* * *
Pons
Gist
The pons is a crucial part of the brainstem (linking the cerebrum to the cerebellum and spinal cord) that manages unconscious functions like breathing, sleep cycles, and relaying sensory/motor signals, containing nerve pathways and nuclei for facial sensation, hearing, balance, and other head/face functions, and is also the name of a popular dictionary/translation service.
The main function of the pons, a part of the brainstem, is to act as a relay station, connecting the cerebrum and cerebellum, and controlling vital functions like breathing, sleep cycles, facial expressions, and relaying sensory/motor signals for hearing, taste, balance, and movement coordination. It helps regulate arousal, fine motor control, and maintains equilibrium, essentially bridging communication between different parts of the brain and the body for essential processes.
Summary
Pons is the portion of the brainstem lying above the medulla oblongata and below the cerebellum and the cavity of the fourth ventricle. The pons is a broad horseshoe-shaped mass of transverse nerve fibres that connect the medulla with the cerebellum. It is also the point of origin or termination for four of the cranial nerves that transfer sensory information and motor impulses to and from the facial region and the brain. The pons also serves as a pathway for nerve fibres connecting the cerebral cortex with the cerebellum.
The pons, while involved in the regulation of functions carried out by the cranial nerves it houses, works together with the medulla oblongata to serve an especially critical role in generating the respiratory rhythm of breathing. Active functioning of the pons may also be fundamental to rapid eye movement (REM) sleep.
Details
The pons (from Latin pons, 'bridge') is the part of the brainstem that, in humans and other mammals, lies inferior to the midbrain, superior to the medulla oblongata, and anterior to the cerebellum.
The pons is also called the pons Varolii ('bridge of Variolus'), after the Italian anatomist and surgeon Costanzo Varolio (1543–1575). The pons contains neural pathways and nerve tracts that conduct signals from the brain down to the cerebellum and medulla, as well as pathways that carry the sensory signals up into the thalamus.
Structure
The pons in humans measures about 2.5 centimetres (0.98 in) in length. It is the part of the brainstem situated between the midbrain and the medulla oblongata. The horizontal medullopontine sulcus demarcates the boundary between the pons and medulla oblongata on the ventral aspect of the brainstem, and the roots of cranial nerves 6, 7, and 8 emerge from the brainstem along this groove. The junction of pons, medulla oblongata, and cerebellum forms the cerebellopontine angle. The superior pontine sulcus separates the pons from the midbrain. Posteriorly, the pons curves on either side into a middle cerebellar peduncle.
A cross-section of the pons divides it into a ventral and a dorsal area. The ventral pons is known as the basilar part, and the dorsal pons is known as the pontine tegmentum.
The ventral aspect of the pons faces the clivus, with the pontine cistern intervening between the two structures. The ventral surface of the pons features a midline basilar sulcus along which the basilar artery may or may not course. There is a bulge to either side of the basilar sulcus, created by the pontine nuclei that are interweaved amid the descending fibres within the substance of the pons. The superior cerebellar artery winds around the upper margin of the pons.
Vasculature
Most of the pons is supplied by the pontine arteries, which arise from the basilar artery. A smaller portion of the pons is supplied by the anterior and posterior inferior cerebellar arteries.
Development
During embryonic development, the metencephalon develops from the rhombencephalon and gives rise to two structures: the pons and the cerebellum. The alar plate produces sensory neuroblasts, which will give rise to the solitary nucleus and its special visceral afferent (SVA) column; the cochlear and vestibular nuclei, which form the special somatic afferent (SSA) fibers of the vestibulocochlear nerve, the spinal and principal trigeminal nerve nuclei, which form the general somatic afferent column (GSA) of the trigeminal nerve, and the pontine nuclei, which relay to the cerebellum.
Basal plate neuroblasts give rise to the abducens nucleus, which forms the general somatic efferent fibers (GSE); the facial and motor trigeminal nuclei, which form the special visceral efferent (SVE) column; and the superior salivatory nucleus, which forms the general visceral efferent fibers (GVE) of the facial nerve.
Nuclei
A number of cranial nerve nuclei are present in the pons:
* mid-pons: the principal sensory nucleus of trigeminal nerve (5)
* mid-pons: the motor nucleus for the trigeminal nerve (5)
* lower down in the pons: abducens nucleus (6)
* lower down in the pons: facial nerve nucleus (7)
* lower down in the pons: vestibulocochlear nuclei (vestibular nuclei and cochlear nuclei) (8)
Function
Functions of these four cranial nerves (5–8) include regulation of respiration; control of involuntary actions; sensory roles in hearing, equilibrium, and taste; and in facial sensations such as touch and pain, as well as motor roles in eye movement, facial expressions, chewing, swallowing, and the secretion of saliva and tears.
The pons contains nuclei that relay signals from the forebrain to the cerebellum, along with nuclei that deal primarily with sleep, respiration, swallowing, bladder control, hearing, equilibrium, taste, eye movement, facial expressions, facial sensation, and posture.
Within the pons is the pneumotaxic center consisting of the subparabrachial and the medial parabrachial nuclei. This center regulates the transition from inhalation to exhalation.
The pons is implicated in sleep paralysis, and may also play a role in generating dreams.
Clinical significance
Central pontine myelinolysis is a demyelinating disease that causes difficulty with sense of balance, walking, sense of touch, swallowing and speaking. In a clinical setting, it is often associated with transplant or rapid correction of blood sodium. Undiagnosed, it can lead to death or locked-in syndrome.
Additional Information
Your pons is a part of your brainstem, a structure that links your brain to your spinal cord. It handles unconscious processes and jobs, such as your sleep-wake cycle and breathing. It also contains several junction points for nerves that control muscles and carry information from senses in your head and face.
Your pons is the second-lowest section of your brainstem, just above your medulla oblongata. It forms a key connection between your brain above it and your medulla oblongata and spinal cord below it.
Your pons is a key merging point for several of your cranial nerves, which are nerves with direct connections to your brain. Those nerve connections are vital, helping with several of the senses on or in your head, plus your ability to move various parts of your face and mouth.
Function:
What is the function of the pons?
Your pons is a part of your brainstem, which links your brain to your spinal cord. That makes your pons a vital section of your nervous system, providing a route for signals to travel to and from your brain. Several neurotransmitters in your pons facilitate brain function, particularly sleep.
Key jobs
Your pons handles several important jobs on its own.
* It influences your sleep cycle. Your pons sets your body’s level of alertness when you wake up.
* It manages pain signals. Your pons relays and regulates the signals that give you the sensation of pain from anywhere in your body below your neck.
* It works with other brain structures. Your pons is a key connection point to your cerebellum, another key part of your brain that handles balance and movement. It also works cooperatively with other parts of your brainstem that manage your breathing.
Cranial nerve connections
In addition, your pons contains several key junctions for four of your 12 cranial nerves, which are nerves that directly connect to your brain. Your cranial nerves (which use Roman numerals for their numbering) that connect to the pons are:
* Trigeminal nerve (Cranial Nerve V): Your trigeminal (try-gem-in-all) nerve provides the sense of touch and pain for your face and controls the muscles you use for chewing.
* Abducens nerve (CN VI): Your abducens (ab-DO-sens) nerve is one of the muscles that control eye movement. Damage to this nerve can cause double vision (diplopia).
* Facial nerve (CN VII): This nerve controls most of your facial expressions and your sense of taste from the front of your tongue.
* Vestibulocochlear nerve (CN VIII): Your vestibulocochlear (vest-ib-you-lo-co-klee-ar) nerve branches into your vestibular nerve and cochlear nerve. Your vestibular (vest-ib-you-lar) nerve gives you your sense of balance. Your cochlear (co-klee-ar) nerve gives you your sense of hearing.
How does it help with other organs?
Your pons helps with other organs by relaying sensory input and directly controlling some of your body’s unconscious processes. Those include your sleep-wake cycle and your breathing. Your ability to feel pain is also something your pons handles, and that sensation of pain can help you react to limit or prevent injuries.
Anatomy:
Where is the pons located?
Your pons is one of the lowermost structures in your brain, located near the bottom of your skull. It’s just above your medulla oblongata, which then connects to your spinal cord through the opening at the bottom of your skull.
What does it look like?
Your pons is a beige or off-white color. Its shape is much like the upper stem of a branch of cauliflower.
How big is it?
Pons’ dimensions are:
* Height: 1.06 inches tall (27 millimeters [mm]).
* Width: 1.49 inches (38 mm).
* Depth: 0.98 inches (25 mm).
What is it made of?
Like the rest of your brain and nervous system, your pons consists of various types of nervous system cells and structures. The nuclei (the plural term for “nucleus”) are nerves or clusters of brain cells that have the same job or connect to the same places.
Making up the nuclei are the following types of cells (with more about them below):
* Neurons: These cells make up your brain and nerves, transmitting and relaying signals. They can also convert signals into either chemical or electrical forms.
* Glial cells: These are support cells in your nervous system. While they don’t transmit or relay nervous system signals, they help the neurons that do.
Neurons
Neurons are the cells that send and relay signals through your nervous system, using both electrical and chemical signals. Each neuron consists of the following:
* Cell body: This is the main part of the cell.
* Axon: This is a long, arm-like part that extends outward from the cell body. At the end of the axon are several finger-like extensions where the electrical signal in the neuron becomes a chemical signal. These extensions, called synapses, lead to nearby nerve cells.
* Dendrites: These are small branch-like extensions (their name comes from a Latin word that means “tree-like”) on the cell body. Dendrites are the receiving point for chemical signals from the synapses of other nearby neurons.
* Myelin: This thin, fatty layer surrounds the axon of many neurons and acts as a protective covering.
Neuron connections are incredibly complex, and the dendrites on a single neuron may connect to thousands of other synapses. Some neurons are longer or shorter, depending on their location in your body and what they do.
Glial cells
Glial (pronounced glee-uhl) cells have many different purposes, helping develop and maintain neurons when you’re young and managing how the neurons work throughout your entire life. They also protect your nervous system from infections, control the chemical balance in your nervous system and create the myelin coating on the neurons’ axons. Your nervous system has 10 times more glial cells than neurons.

Hi,
#2541. What does the medical term Glycemic load mean?
Hi
#9823.
Hi,
#6317.
Hi,
2672.
2462) Trans Siberian Railway
Gist
The classic Trans-Siberian Railway runs from Moscow in European Russia to Vladivostok on the Pacific coast, crossing nearly 9,289 kilometers (5,772 miles) and eight time zones, making it the world's longest railway line, with branches extending to destinations like Beijing (Trans-Mongolian) and China (Trans-Manchurian).
The Trans-Siberian Railway, historically known as the Great Siberian Route and often shortened to Transsib, is a large railway system that connects European Russia to the Russian Far East. Spanning a length of over 9,289 kilometers (5,772 miles), it is the longest railway line in the world.
Summary
The Trans-Siberian Railway, historically known as the Great Siberian Route and often shortened to Transsib, is a large railway system that connects European Russia to the Russian Far East. Spanning a length of over 9,289 kilometers (5,772 miles), it is the longest railway line in the world. It runs from the city of Moscow in the west to the city of Vladivostok in the east.
During the period of the Russian Empire, government ministers—personally appointed by Alexander III and his son Nicholas II—supervised the building of the railway network between 1891 and 1916. Even before its completion, the line attracted travelers who documented their experiences. Since 1916, the Trans-Siberian Railway has directly connected Moscow with Vladivostok. As of 2021, expansion projects remain underway, with connections being built to Russia's neighbors Mongolia, China, and North Korea. Additionally, there have been proposals and talks to expand the network to Tokyo, Japan, with new bridges or tunnels that would connect the mainland railway via the Russian island of Sakhalin and the Japanese island of Hokkaido.
Route
The railway is often associated with the main transcontinental Russian line that connects many large and small cities of the European and Asian parts of Russia. At a Moscow–Vladivostok track length of 9,289 kilometers (5,772 miles), it spans a record eight time zones. Taking eight days to complete the journey, it was the third-longest single continuous service in the world, after the Moscow–Pyongyang service 10,267 kilometers (6,380 mi) and the former Kiev–Vladivostok service 11,085 kilometers (6,888 mi), both of which also follow the Trans-Siberian for much of their routes.
The main route begins in Moscow at Yaroslavsky Vokzal, runs through Yaroslavl or Chelyabinsk, Omsk, Novosibirsk, Krasnoyarsk, Irkutsk, Ulan-Ude, Chita, and Khabarovsk to Vladivostok via southern Siberia. A second primary route is the Trans-Manchurian, which coincides with the Trans-Siberian east of Chita as far as Tarskaya (a stop 12 km (7 mi) east of Karymskoye, in Chita Oblast), about 1,000 km (621 mi) east of Lake Baikal. From Tarskaya the Trans-Manchurian heads southeast, via Harbin Harbin–Manzhouli railway and Mudanjiang Harbin–Suifenhe railway in China's Northeastern provinces (from where a connection to Beijing is used by one of the Moscow–Beijing trains), joining the main route in Ussuriysk just north of Vladivostok.
The third primary route is the Trans-Mongolian Railway, which coincides with the Trans-Siberian as far as Ulan-Ude on Lake Baikal's eastern shore. From Ulan-Ude the Trans-Mongolian heads south to Ulaanbaatar before making its way southeast to Beijing. In 1991, a fourth route running further to the north was finally completed, after more than five decades of sporadic work. Known as the Baikal–Amur Mainline (BAM), this recent extension departs from the Trans-Siberian line at Taishet several hundred miles west of Lake Baikal and passes the lake at its northernmost extremity. It crosses the Amur River at Komsomolsk-na-Amure (north of Khabarovsk), and reaches the Tatar Strait at Sovetskaya Gavan.
Details
Trans-Siberian Railroad, the longest single rail system in the world, stretching 5,771 miles (9,288 km) across Russia between Moscow and Vladivostok. If its connection to the port station of Nakhodka is also included, the system reaches a total of 5,867 miles (9,441 km). The Trans-Siberian Railroad has had a profound effect on the region of Siberia as well as great importance in the economic and military history of the Russian Empire and the Soviet Union.
The main track length of the Trans-Siberian Railroad between Moscow and Vladivostok spans eight time zones and involves a journey time of seven days. Its western terminus is the Yaroslavsky station in Moscow, although a connecting service can be used to go farther west to St. Petersburg on the Baltic Sea. Moving eastward from Moscow, the railroad’s main route passes through Yekaterinburg and crosses the Ural Mountains before reaching Novosibirsk on the Ob River and then Krasnoyarsk on the Yenisey River. The route extends through Irkutsk and Ulan-Ude, following the southern shore of Lake Baikal between those cities, and then moves roughly in parallel to Russia’s border with Mongolia and then China before arriving at Khabarovsk on the Amur River and, finally, at Vladivostok on the Sea of Japan (East Sea).
A secondary route of the Trans-Siberian Railroad branches out at Ulan-Ude. For trains traveling eastward, it heads south to Mongolia’s capital, Ulaanbaatar, and onward to Beijing, China. This route is known as the Trans-Mongolian Railroad. A third route, the Trans-Manchurian Railroad, turns southeast after Lake Baikal and goes to the Chinese cities of Harbin and Mudanjiang before rejoining the main track just before Vladivostok. The Trans-Manchurian Railroad also provides service to P’yŏngyang, North Korea.
Throughout its history, Siberia has been subject to particularly harsh winter weather, and efforts to develop the region, beginning with Russian occupation of it during the 16th century, made little progress until well into the 19th century because of the absence of good roads. Horse-drawn sledges were the common mode of transport in winter, and in the summer months river navigation was used. Early attempts to set up a railway in the region were a response to the Russian Empire’s colonization of Siberia. Colonizing forces had to either transport essentials from Russian lands in the west or import them from China and Korea. However, progress on building a railway was slow because of the Russian bureaucracy and because Siberia was not, at the time, considered commercially important enough to invest in new infrastructure.
Russia’s focus during the later 19th century was on Central Asia, which was seen as a buffer zone between the Russian Empire and the British-ruled Indian subcontinent. Both powers engaged in the “Great Game” to consolidate their presence in Central Asia and to influence the many khanates of the region. The British advanced to Afghanistan, while the Russians eventually annexed the khanates of Khiva and Bukhara. Russia built the Trans-Caspian Railroad, which in 1888 reached Samarkand in present-day Uzbekistan, putting Afghanistan at risk of Russian invasion.
Russia’s focus shifted east under the vision of Sergei Witte, who, while working within the Russian ministry of finance, convinced Alexander III in 1891 to begin construction of what would become the Trans-Siberian Railroad. The intent was to extend Russian influence into East Asia and to capture global trade from British hands. The railway would allow merchandise and raw materials to be transported from Europe to the Pacific in half the time it took by sea. It would thus be attractive to traffic by other countries as well, threatening British domination on their traditional sea routes. So, too, the railway would allow the extraction of hitherto untapped resources in Siberia.
Work on the Trans-Siberian Railroad proceeded simultaneously in several sections. It was built concurrently in three stretches. The first stretch was the West Siberian Railroad from Chelyabinsk to the Ob River, completed in 1896. The second stretch, the Central Siberian Railroad, was from the Ob River to Irkutsk on the western shore of Lake Baikal; it was completed in 1899. The third stretch was the East Siberian Railroad from Ulan-Ude on the eastern shore of Lake Baikal to Vladivostok.
By early 1901 only about 1,240 miles (2,000 km) of the line remained to be built before a direct connection between Europe and the Pacific Ocean could be completed. But, due to Siberia’s harsh climate and geological conditions, the line was continued via a southerly section through Manchuria in China. In 1903 this Russian-built Chinese Eastern Railway was put into operation. Lake Baikal, however, was still a barrier: cargo and passengers had to cross the lake by ferry until a rail line around Lake Baikal was put into operation in 1905.
But the segment of the Trans-Siberian Railroad in Manchuria was to have consequences for Russia. In 1900 the Boxer Rebellion took place in China, targeting “foreign devils” and seeking to drive them out. Rebels in Manchuria had a specific grievance against the railroad, which they believed was responsible for upsetting the harmony of the region and causing droughts and flooding. The Russians moved 170,000 troops into Manchuria to protect their investment there, raising alarm in Japan over Russian intentions. Tensions were not eased by a new group of ministers in Moscow who had edged Witte out; they favoured a more aggressive foreign policy and refused to withdraw troops from Manchuria.
The Japanese attacked the Russian naval base at Port Arthur on the night of February 8–9, 1904, which was the start of the Russo-Japanese War. The war showcased the limitations of the railway, with its single-line route causing bottlenecks in the movement of troops and supplies. If one train with wounded troops was moving west, for instance, another train headed east with critical supplies had to wait at a station until the first had passed. After heavy losses in the 18-month war, Russia built a longer route, the Amur Railroad, to Vladivostok through its own territory so as to guard against the risk of Manchuria being taken over by the Japanese. In 1916 there was finally a Trans-Siberian Railroad wholly within Russian territory. Its completion marked a turning point in the history of Siberia, opening up vast areas to exploitation, settlement, and industrialization.
During the Russian Civil War that took place after the revolution in 1917, the Trans-Siberian Railroad was used by anticommunist forces to move troops, including Canadian reinforcements, westward from Vladivostok. Communist forces had to resort to blowing up bridges and sections of track to defeat them.
During World War II the nonaggression pact between the Germans and the Soviets enabled Nazi Germany to use the Trans-Siberian Railroad for the movement of goods to and from Japan. The railway also provided thousands of Jews a means of escaping Europe, using an eastward route to Vladivostok before sailing to the United States. After Germany invaded the Soviet Union and drove the Soviet Union to join the Allies, the railway allowed the U.S. to move much-needed supplies to the European front via the Pacific. The trans-Manchurian line came under full Chinese control only after World War II; it was renamed the Chinese Changchun Railway. During the Soviet era, a number of spur lines were built that radiated from the main trans-Siberian line. From 1974 to 1989 construction was completed on a large alternative route, the Baikal-Amur line; its route across the challenging environment of taiga, permafrost, and swamps made upkeep difficult. The Trans-Siberian Railroad was underused in the aftermath of the collapse of the Soviet Union but then saw a resurgence, due to improving economic conditions in Russia and tourism, at the turn of the millennium. Thawing permafrost due to climate change is, however, putting parts of the line at risk and leading to an increase in maintenance costs.
More than 85,000 people are estimated to have been involved in the construction of the Trans-Siberian Railroad. It remains the backbone of the Russian railway network, and today it is a double-track electrified line that has enabled millions of people to travel across Russia.
Additional Information
As soon as it was built at the beginning of the 19th century, the Trans-Siberian Railway was proclaimed the finest of the diamonds on the crown of the Russian Empire and became famous to the whole world. Since then, it is attracting many travelers striving to see the miracle of engineering and to experience the peculiar way of journey. At the same time, the Trans-Siberian regular trains are mostly used by locals for their commuting needs, so it is an excellent way to meet the real people and feel the pure soul of the country. The Trans-Siberian Railway uniquely combines romantic ideas about traveling with absolutely incomparable landscapes and unique impressions; all this makes the trip once-in-a-lifetime adventure.
Trans-Siberian routes
The original Trans-Siberian Railway connects Moscow and Vladivostok, covers 9829 km and crosses eight time zones, being the longest railway in the world. It will take seven days to travel from Moscow to Vladivostok without stops. In Ulan-Ude, the mainline branches in three directions. The Trans-Siberian section extends to Vladivostok, the Trans-Manchurian line goes through Northern China to Beijing, and the Trans-Mongolian line also ends in the capital of China but passes through Ulan Bator. Take a look at the Trans-Siberian route map and imagine all the possibilities the Trans-Siberian Railway can offer to tourists.
Transsiberian nonstop by direct regular trains
If the purpose of the journey is to cross the maximum distance by rail in the shortest time, if enjoying the scenery from the window and communicating with fellow will give you enough impressions, then all you need is to buy a ticket for a direct train along the Trans-Siberian, Trans-Mongolian or Trans-Manchurian route nonstop. The original Tran-Siberian trip will take 7 days, the Trans-Manchurian trip - 6 days, and a train ride to Ulan-Bator - about 5 days. You can visit the pages of these routes on our website and see the train schedule from Moscow to Vladivostok, Beijing, or Ulan Bator.

Medulla Oblongata
Gist
The medulla oblongata is the lowermost part of the brainstem, connecting the brain to the spinal cord and controlling vital involuntary functions like breathing, heart rate, and blood pressure, while also relaying sensory/motor signals and housing nuclei for several cranial nerves (IX-XII). It acts as a crucial relay station for nerve tracts, coordinates automatic reflexes (coughing, swallowing, vomiting), and is where motor signals cross over from one brain hemisphere to the opposite body side.
The medulla oblongata's main function is controlling vital, involuntary life processes like breathing, heart rate, and blood pressure, while also managing reflexes such as swallowing, sneezing, coughing, and relaying signals between the brain and spinal cord. It acts as a crucial bridge, managing automatic functions essential for survival and coordinating basic bodily responses.
Summary
The medulla oblongata or simply medulla is a long stem-like structure which makes up the lower part of the brainstem. It is anterior and partially inferior to the cerebellum. It is a cone-shaped neuronal mass responsible for autonomic (involuntary) functions, ranging from vomiting to sneezing. The medulla contains the cardiovascular center, the respiratory center, vomiting and vasomotor centers, responsible for the autonomic functions of breathing, heart rate and blood pressure as well as the sleep–wake cycle.[2] "Medulla" is from Latin, ‘pith or marrow’. And "oblongata" is from Latin, ‘lengthened or longish or elongated'.
During embryonic development, the medulla oblongata develops from the myelencephalon. The myelencephalon is a secondary brain vesicle which forms during the maturation of the rhombencephalon, also referred to as the hindbrain.
The bulb is an archaic term for the medulla oblongata. In modern clinical usage, the word bulbar (as in bulbar palsy) is retained for terms that relate to the medulla oblongata, particularly in reference to medical conditions. The word bulbar can refer to the nerves and tracts connected to the medulla such as the corticobulbar tract, and also by association to those muscles innervated, including those of the tongue, pharynx and larynx.
Details
Medulla oblongata is the lowest part of the brain and the lowest portion of the brainstem. The medulla oblongata is connected by the pons to the midbrain and is continuous posteriorly with the spinal cord, with which it merges at the opening (foramen magnum) at the base of the skull. The medulla oblongata plays a critical role in transmitting signals between the spinal cord and the higher parts of the brain and in controlling autonomic activities, such as heartbeat and respiration.
The medulla is divided into two main parts: the ventral medulla (the frontal portion) and the dorsal medulla (the rear portion; also known as the tegmentum). The ventral medulla contains a pair of triangular structures called pyramids, within which lie the pyramidal tracts. The pyramidal tracts are made up of the corticospinal tract (running from the cerebral cortex to the spinal cord) and the corticobulbar tract (running from the motor cortex of the frontal lobe to the cranial nerves in the brainstem). In their descent through the lower portion of the medulla (immediately above the junction with the spinal cord), the vast majority (80 to 90 percent) of corticospinal tracts cross, forming the point known as the decussation of the pyramids. The ventral medulla also houses another set of paired structures, the olivary bodies, which are located laterally on the pyramids.
The upper portion of the dorsal medulla forms the lower region of the fourth ventricle (a fluid-filled cavity formed by the expansion of the central canal of the spinal cord upon entering the brain). Similar to the spinal cord, the fourth ventricle is surrounded by white matter on the outside, with the gray matter on the inside. The dorsal medulla also is the site of origin for the last seven cranial nerves, most of which exit the medulla ventrally.
The medulla consists of both myelinated (white matter) and unmyelinated (gray matter) nerve fibres, and, similar to other structures in the brainstem, the white matter of the medulla, rather than lying beneath the gray matter, is intermingled with the latter, giving rise to part of the reticular formation (a network of interconnected neuron clusters within the brainstem). Neurons of the reticular formation play a central role in the transmission of motor and sensory impulses. Those in the medulla carry out complex integrative functions; for example, different functional centres specialize in the control of autonomic nervous activity, regulating respiration, heart rate, and digestive processes. Other activities of neurons in the medulla include control of movement, relay of somatic sensory information from internal organs, and control of arousal and sleep.
Injuries or diseases affecting the middle portion of the medulla may result in medial medullary syndrome, which is characterized by partial paralysis of the opposite side of the body, loss of the senses of touch and position, or partial paralysis of the tongue. Injuries or disease of the lateral medulla may cause lateral medullary syndrome, which is associated with a loss of pain and temperature sensations, loss of the gag reflex, difficulty in swallowing, vertigo, vomiting, or loss of coordination.
Additional Information
Understanding the medulla oblongata is crucial for comprehending how our nervous system functions. This part of the brainstem plays a vital role in regulating essential bodily processes that keep us alive.
Its significance lies not only in its fundamental responsibilities but also in its intricate connections with various neural pathways and organs.
Anatomical Structure
The medulla oblongata, nestled at the base of the brainstem, serves as a bridge between the brain and the spinal cord. Its location is strategic, allowing it to act as a conduit for neural signals traveling to and from the brain. This positioning is not merely incidental; it underscores the medulla’s role in integrating and relaying information essential for bodily functions.
Structurally, the medulla is composed of both white and gray matter. The white matter consists of myelinated nerve fibers that facilitate rapid signal transmission, while the gray matter contains neuronal cell bodies that process and relay information. This dual composition enables the medulla to perform its complex regulatory tasks efficiently. The presence of various nuclei within the gray matter further enhances its ability to manage diverse physiological processes.
One of the most notable features of the medulla is the presence of the pyramids, which are two longitudinal ridges on its anterior surface. These pyramids house the corticospinal tracts, which are crucial for voluntary motor control. The decussation, or crossing over, of these tracts occurs in the lower medulla, explaining why each hemisphere of the brain controls the opposite side of the body. This anatomical arrangement is fundamental for coordinated motor function.
In addition to the pyramids, the medulla contains several other important structures, such as the olive, a prominent bulge on its lateral aspect. The olive is involved in motor learning and coordination, highlighting the medulla’s role in fine-tuning motor activities. The inferior olivary nucleus within the olive sends fibers to the cerebellum, further integrating motor control and sensory information.
Cardiovascular Regulation
The medulla oblongata’s role in cardiovascular regulation is profound, given its responsibility for maintaining stable heart function and blood pressure. At the core of this regulation is the cardiovascular center, a cluster of neurons embedded within the medulla. These neurons continuously process input from baroreceptors and chemoreceptors located in blood vessels, which monitor changes in blood pressure and chemical composition, respectively.
Upon receiving this sensory information, the medulla orchestrates a response through the autonomic nervous system. It can either activate the sympathetic nervous system to increase heart rate and constrict blood vessels, or engage the parasympathetic nervous system to slow down the heart rate and dilate vessels. This dynamic interplay ensures that the body can adapt to various demands, such as physical exertion or rest, maintaining homeostasis.
The medulla’s regulatory function extends to the vasomotor center, which specifically targets blood vessel diameter. By adjusting vascular tone, the medulla helps control systemic vascular resistance, thus influencing blood pressure. The coordination between heart rate and vascular resistance is crucial for effective circulation, ensuring that tissues receive adequate oxygen and nutrients while removing metabolic waste.
Neurotransmitters play a pivotal role in these processes. For example, norepinephrine released from sympathetic nerve endings causes vasoconstriction, while acetylcholine from parasympathetic fibers induces vasodilation. This biochemical precision allows the medulla to fine-tune cardiovascular responses with remarkable accuracy.
Respiratory Control
The medulla oblongata’s influence on respiratory control is both intricate and indispensable. Within its depths lie the dorsal and ventral respiratory groups, clusters of neurons that play a central role in the rhythmic generation of breathing. These neural networks receive input from peripheral chemoreceptors that detect changes in blood oxygen, carbon dioxide levels, and pH, allowing the medulla to adjust breathing patterns in response to the body’s metabolic demands.
The dorsal respiratory group primarily manages the basic rhythm of breathing by sending signals to the diaphragm and intercostal muscles, prompting them to contract and draw air into the lungs. This rhythmic activity is modulated by the ventral respiratory group, which becomes particularly active during periods of heightened respiratory demand, such as exercise or stress. By coordinating these neural signals, the medulla ensures that ventilation matches the body’s needs, maintaining optimal gas exchange.
An additional layer of complexity is introduced through the interaction between the medulla and the pons, another brainstem structure that fine-tunes the breathing process. The pons contains the pneumotaxic and apneustic centers, which influence the medullary respiratory groups to adjust the rate and depth of breaths. This collaboration between the medulla and the pons enables a smooth transition between inhalation and exhalation, preventing erratic breathing patterns.
Reflex Centers
The medulla oblongata’s role in managing reflex actions is a testament to its evolutionary sophistication. Reflexes are automatic responses to stimuli, essential for survival, and the medulla houses several crucial reflex centers that handle these involuntary actions with remarkable precision. These centers are responsible for orchestrating complex reflexive activities, such as coughing, sneezing, swallowing, and vomiting, which protect the body from harm and facilitate essential functions.
Take, for example, the swallowing reflex. When food or liquid contacts the pharynx, sensory receptors send signals to the swallowing center in the medulla. This initiates a highly coordinated sequence of muscle contractions, ensuring that the bolus is safely transported from the mouth to the esophagus, bypassing the respiratory tract. This reflexive action prevents aspiration and safeguards the airway, illustrating the medulla’s critical role in basic yet vital processes.
Equally fascinating is the medulla’s involvement in the vomiting reflex. When noxious substances are detected in the stomach or bloodstream, the chemoreceptor trigger zone (CTZ) in the medulla activates the vomiting center. This leads to a complex series of motor responses, including the contraction of abdominal muscles and the relaxation of the lower esophageal sphincter, resulting in the expulsion of harmful contents. This protective mechanism exemplifies the medulla’s ability to rapidly respond to potential threats, maintaining internal stability.
Cranial Nerve Interaction
The medulla oblongata also plays a significant role in the functionality of cranial nerves, specifically those that emerge directly from this part of the brainstem. These nerves are integral to sensory and motor functions that span various regions of the head and neck, forming a crucial communication network between the brain and peripheral structures.
Among the cranial nerves, the glossopharyngeal (IX) and vagus (X) nerves are particularly noteworthy. They are involved in a myriad of functions, from taste sensation to the regulation of visceral organs. The glossopharyngeal nerve is responsible for transmitting sensory information from the pharynx and the back of the tongue, while also contributing to the control of swallowing. The vagus nerve, often dubbed the “wanderer,” extends its influence far beyond the head and neck, reaching into the thoracic and abdominal cavities. It is essential for autonomic control over heart rate, gastrointestinal peristalsis, and respiratory rate, reflecting the medulla’s extensive reach in maintaining physiological balance.
The hypoglossal nerve (XII) is another key player, emerging from the medulla to innervate the muscles of the tongue. This nerve is vital for articulating speech and facilitating the complex process of mastication. Through these cranial nerve interactions, the medulla oblongata exerts a considerable influence on both voluntary and involuntary activities, demonstrating its vast regulatory capabilities. The integration of these nerves underscores the medulla’s role as a central hub for essential life-sustaining functions.
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Colleagues Quotes - II
1. It is a sad but undeniable reality that people have died in the line of duty since the earliest days of the United Nations. The first was Ole Bakke, a Norwegian member of the United Nations guard detachment, shot and killed in Palestine in 1948. The toll since then has included colleagues at all levels. - Ban Ki-moon
2. Whatever position I occupied, it was the result of colleagues - of my comrades in the movement - who had decided in their wisdom to use me for the purpose of focusing the attention of the country and the international community on me. - Nelson Mandela
3. We are sometimes asked what the result would be if we put four +'s in one gene. To answer this my colleagues have recently put together not merely four but six +'s. - Francis Crick
4. Some people work hard in this business and become really popular, really big stars but they never receive an award from within the business. Somehow, when your colleagues and friends believe in you to the point of handing you an award it means so much more. - Sharon Stone
5. The importance of building relationships among colleagues, of trying to create coalitions behind the issues that you are championing, was not something I ever had much insight into until I was elected and started serving in the Senate. - Hillary Clinton
6. The people have given me their support; they have given me their trust and confidence. My colleagues have suffered a lot in order to give me support. I do not look upon my life as a sacrifice at all. - Aung San Suu Kyi
7. I have no hang-ups in life. I don't care about groups and camps. I have been brought up with certain values and ethics. I have never been egoistic about my stardom and lineage. I don't have any qualms about breaking the ice with my colleagues. I can walk up to any actor and greet him, irrespective of what kind of equation I share with him. - Abhishek Bachchan
8. I believe in wishing my colleagues and other celebs in a manner that brings my wit out and gives people a talking point. But there are people who love and those who hate you. That's part of a celeb's life. - Virender Sehwag.
Q: What do you get if you cross a dog with a daisy?
A: A colli-flower.
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Q: Where do vegetables grow up?
A: Cauli-fornia.
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Q: What did the husband do after forgetting his wife's birthday?
A: Cauliflower shop!
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Q: What water yields the most beautiful cauliflower garden?
A: Perspiration!
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