Vomiting is a complex process that results from a coordinated interaction of the brain, nerve pathways, and the muscles of the gastrointestinal system. The Major vomiting trigger point in the brain is referred to as the area postrema. This structure is often exposed to various chemicals in the cerebrospinal fluid (the fluid found in the spinal cord and brain) and the bloodstream. Scientific researchers have revealed that stimulation of the area postrema by a broad variety of drugs and radiation, bacterial toxins, and physiologic conditions, stimulates vomiting.
Certain nerve pathways (known as afferent neural pathways) often induce vomiting when triggered by tumors, ear infections or motion, Meniere’s disease (the disease characterized by frequent vertigo), visual stimulation, odors, bad tastes, and pain. Other nerve pathways (the peripheral afferent neural pathways) also induce vomiting in response to the stomach irritants, abdominal inflammation, distension of the bile ducts and intestines, and the myocardial infarction (heart attack).
The physical activity of vomiting is usually controlled by numerous sites of the brain stem. When triggered, these structures always send signals to the abdominal muscles, diaphragm, and throat. These signals result in the instantaneous contraction of these muscles that brings up the contents of the stomach through the esophagus (the tube between the throat and the stomach) and out the mouth. When vomiting, breathing is suppressed, except for the short breaths between discharges. Bradycardia (reduction in the heart rate) and even the changes in blood pressure may happen during retching and vomiting.
Several different things can stimulate vomiting. Vomiting which lasts only 1 or 2 days is often caused by a reaction to medication, infection, uremia (the accumulation of protein breakdown substances in the bloodstream), a toxin, and diabetic ketoacidosis (accumulation of different toxins resulting from uncontrolled diabetes). Vomiting which lasts longer than a week can be caused by a psychiatric or long-term medical condition.
Pregnant women normally experience frequent episodes of nausea and vomiting, especially during the initial stages of pregnancy. This is commonly called “morning sickness,” even though it can happen at any time of the day.
In many cases, morning sickness will occur at some point during the first 3 months of pregnancy and will pass by nearly weeks 16 to 20.
Nausea and vomiting related with traveling could be a symptom of motion sickness. These symptoms can occasionally be prevented by using methods such distracting yourself by listening to music as or fixing your eyes on the horizon, even though medication to treat and prevent motion sickness is also available. Here are 5 fascinating facts you should know about vomiting:
1. If you attempt to stop yourself from vomiting by closing your mouth, the vomit will eventually come out your nose.
2. The unpleasant taste during vomiting comes from the hydrochloric acid that’s adamant it can eat through paint or even go through stainless steel; its form is even used by some bricklayers to clean the mortar.
3. On the Eve New of Year, 1998, vomit vigilantes (euphemistically known as ‘Clean Teams’) were dispatched all over the Grand Central Station of New York City. They’re supposed to thrust a throw-up bag underneath the chin of anybody who appeared to be ready to throw up.
4. There is human vomit on the moon. Buzz Aldrin and Neil Armstrong left over 100 items on the moon, including the bag of vomit!
5. What do you know about projectile vomiting? The good news with the projectile vomiting is that it happens abruptly, usually before an individual experiences nausea. The sad news is that it is often a result of a gastric outlet obstruction that can occur due to the ingestion of a foreign body. However, it may also be a symptom of an adverse underlying condition like increased intracranial pressure.