MEDICAL PHYSIOLOGY

Detailed explanation-1: -The area postrema (AP) has been implicated as a chemoreceptor trigger zone for vomiting (emesis) for over 40 years. The AP is located on the dorsal surface of the medulla oblongata at the caudal end of the fourth ventricle .

Detailed explanation-2: -The chemoreceptor trigger zone (CTZ) for emesis, also commonly known as the area postrema (AP), is located within the dorsal surface of the medulla oblongata, on the floor of the fourth ventricle of the brain.

Detailed explanation-3: -Involuntary actions like salivation, vomiting, blood pressure are controlled by the medulla in the hindbrain.

Detailed explanation-4: -role in vomiting These contractions begin at the small intestine and move successively through the stomach… … may act by depressing the chemoreceptor trigger zone, which is located in the hypothalamus of the brain and controls vomiting.