Vomiting - Mechanism

Vomiting (or emesis) is the forceful expulsion of the contents of one's stomach through the mouth. Although it probably evolved as a mechanism for expelling ingested poisons, vomiting may result from many causes not related to poisoning, ranging from gastritis to brain tumors, or elevated intracranial pressure (ICP). The feeling that one is about to vomit is called nausea. It usually, but not necessarily, precedes vomiting, but it does not always lead to vomiting. Antiemetics are somet ...

Including:

• Vomiting - Mechanism
• Vomiting - Content
• Vomiting - Causes
• Vomiting - Digestive tract
• Vomiting - Sensory system and brain
• Vomiting - Other
• Vomiting - Related medication
• Vomiting - Emetics
• Vomiting - Antiemetics
• Vomiting - Social implications
• Vomiting - Nausea inducement in groups
• Vomiting - Context
• Vomiting - In language
• Vomiting - In other animals

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Vomiting is co-ordinated in the vomiting center in the lateral medullary reticular formation in the medulla. Receptors on the floor of the fourth ventricle of the brain represent a chemoreceptor trigger zone, stimulation of which can lead to vomiting. The chemoreceptor zone lies outside the blood-brain barrier, and can therefore be stimulated by blood-borne drugs that can stimulate vomiting, or inhibit it. There are various sources of input to the vomiting center: As stated earlier, the chemoreceptor trigger zone which li ...

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Vomiting, Vomiting - Mechanism, Vomiting - Content, Vomiting - Causes, Vomiting - Digestive tract, Vomiting - Sensory system and brain, Vomiting - Other, Vomiting - Related medication, Vomiting - Emetics, Vomiting - Antiemetics, Vomiting - Social implications, Vomiting - Nausea inducement in groups, Vomiting - Context, Vomiting - In language, Vomiting - In other animals

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Vomiting - Nausea inducement in groups. It is quite common that when one person vomits, others nearby will become nauseated, particularly when smelling the vomit of others, often to the point of vomiting themselves. It is believed that this is an evolved trait among primates. Many primates in the wild will tend to browse for food in small groups. Should one member of the party react adversely to some ingested food it may be advantageous (in a survival sense) for other members of the party also to vomit. This tend ...

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Vomiting, Vomiting - Mechanism, Vomiting - Content, Vomiting - Causes, Vomiting - Digestive tract, Vomiting - Sensory system and brain, Vomiting - Other, Vomiting - Related medication, Vomiting - Emetics, Vomiting - Antiemetics, Vomiting - Social implications, Vomiting - Nausea inducement in groups, Vomiting - Context, Vomiting - In language, Vomiting - In other animals

Read more here: » Vomiting: Encyclopedia II - Vomiting - Social implications

Vomiting - Nausea inducement in groups. It is quite common that when one person vomits, others nearby will become nauseated, particularly when smelling the vomit of others, often to the point of vomiting themselves. It is believed that this is an evolved trait among primates. Many primates in the wild will tend to browse for food in small groups. Should one member of the party react adversely to some ingested food it may be advantageous (in a survival sense) for other members of the party to also vomit. This tend ...

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Vomiting, Vomiting - Mechanism, Vomiting - Content, Vomiting - Causes, Vomiting - Digestive tract, Vomiting - Sensory system and brain, Vomiting - Other, Vomiting - Related medication, Vomiting - Emetics, Vomiting - Antiemetics, Vomiting - Social implications, Vomiting - Nausea inducement in groups, Vomiting - Context, Vomiting - In language, Vomiting - In other animals

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Vomiting may be due to a large number of causes, and protracted vomiting has a long differential diagnosis. Vomiting - Digestive tract. Causes in the digestive tract: Gastritis (inflammation of the gastric wall, usually by viruses) Pyloric stenosis (in babies - this typically causes a very forceful "projectile vomiting" and is an indication for urgent surgery) Bowel obstruction Acute abdomen and/or peritonitis Ileus Cholecystitis, pancreatitis, appendicitis, hepatitis, pregnancy Vomiting ...

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Vomiting, Vomiting - Mechanism, Vomiting - Content, Vomiting - Causes, Vomiting - Digestive tract, Vomiting - Sensory system and brain, Vomiting - Other, Vomiting - Related medication, Vomiting - Emetics, Vomiting - Antiemetics, Vomiting - Social implications, Vomiting - Nausea inducement in groups, Vomiting - Context, Vomiting - In language, Vomiting - In other animals

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As the stomach secretes acid, vomit contains a high concentration of hydronium ions and is thus strongly acidic. The potential physiological complications associated with excessive vomiting are mainly metabolic alkalosis (increased blood pH), hypokalemia (potassium depletion) and hypochloremia (chlorine depletion). The hypokalemia is an indirect result of the kidney compensating for the loss of acid. The content of the vomitus (vomit) may be of medical interest. Fresh blood in the vomit is termed hematemesis ("blood vomiting"). ...

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Vomiting, Vomiting - Mechanism, Vomiting - Content, Vomiting - Causes, Vomiting - Digestive tract, Vomiting - Sensory system and brain, Vomiting - Other, Vomiting - Related medication, Vomiting - Emetics, Vomiting - Antiemetics, Vomiting - Social implications, Vomiting - Nausea inducement in groups, Vomiting - Context, Vomiting - In language, Vomiting - In other animals

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Vomiting - Emetics. An emetic, such as Syrup of Ipecac, is a substance that induces vomiting when administered orally or by injection. An emetic is used medically where a substance (typically poison) has been ingested and must be expelled from the body immediately. Inducing vomiting can remove the substance before it is absorbed into the body. Vomiting - Antiemetics. An antiemetic is a drug that is effective against vomiting and nausea. Antiemetics are typically used to treat motion sickness and the side effects of some opioid analg ...

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Vomiting, Vomiting - Mechanism, Vomiting - Content, Vomiting - Causes, Vomiting - Digestive tract, Vomiting - Sensory system and brain, Vomiting - Other, Vomiting - Related medication, Vomiting - Emetics, Vomiting - Antiemetics, Vomiting - Social implications, Vomiting - Nausea inducement in groups, Vomiting - Context, Vomiting - In language, Vomiting - In other animals

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