where in the brain is the vomiting center located? course hero

by Meghan Sauer MD Published 2 years ago Updated 1 year ago 9 min read

The vomiting centre of the brain

The fourth ventricle of the brain hosts the vomiting centre. The floor of the fourth ventricle contains an area called the (CTZ).

What part of the brain is responsible for vomiting?

Where in the brain is the vomiting center located Hypothalamus Medulla oblongata from NU 545-806 at University of South Alabama

How does the vomiting centre work Brainly?

Where in the brain is the vomiting center located? a. Hypothalamus c. Pons b. Medulla oblongata d. Midbrain ANS: B

How does the brain know when to throw up?

Where in the brain is the vomiting center located? a. Hypothalamus b. Medulla oblongata c. Pons d. Midbrain ANS: B The vomiting center of the brain lies in the medulla oblongata and includes …

Can neurological problems cause nausea and vomiting?

The Chemoreceptor Trigger Zone is an area in the medulla oblangata which when stimulated causes vomiting to occur. The vomiting center is also located in the medulla oblangata and …

Where is the vomiting center located in the brain?

medulla oblongata

role in vomiting

…by two distinct brain centres—the vomiting centre and the chemoreceptor trigger zone—both located in the medulla oblongata. The vomiting centre initiates and controls the act of emesis, which involves a series of contractions of the smooth muscles lining the digestive tract.

What stimulates the vomiting center?

The vomiting centre is predominantly activated by three different mechanisms: By nervous impulses from the stomach, intestinal tract, and other portions of the body, resulting in a reflexive activation; By stimulation from the higher brain centres; By the chemoreceptor trigger zone (CTZ) sending impulses.

What factors may stimulate the vomiting reflex?

The higher centers of the brain, including the cerebral cortex and the limbic system, can trigger emesis through three mechanisms: direct stimulation of the vomiting center by inflammatory diseases, hydrocephalus, or neoplasia; psychogenic stimulation caused by fear, stress, excitement, or pain; and traumatic ...

What stimulates the chemoreceptor trigger zone?

The CTZ is stimulated by endogenous toxic substances produced in acute infectious diseases or metabolic disorders such as uremia and diabetic ketoacidosis and by drugs and other exogenous toxins.

What part of the brain controls nausea and vomiting?

The vomiting centre of the brain

The fourth ventricle of the brain hosts the vomiting centre. The floor of the fourth ventricle contains an area called the chemoreceptor trigger zone (CTZ). It is also called the area postrema. When the CTZ is stimulated, vomiting may occur.Feb 27, 2019

What is the difference between the vomiting center and the CTZ?

The chemoreceptor trigger zone (CTZ) is an area of the medulla oblongata that receives inputs from blood-borne drugs or hormones, and communicates with other structures in the vomiting center to initiate vomiting.

Can brain problems cause vomiting?

Neurological disorders that may cause chronic or recurrent nausea and/or vomiting include migraine, increased intracranial pressure, labyrinthine disorders and demyelinating disorders. Usually there are neurological symptoms and signs that clue the physician into these possibilities.

What is the significance of the CTZ lying outside the blood brain barrier?

The CTZ lies partly outside the blood-brain barrier, allowing exposure to water-soluble chemicals in the blood and cerebrospinal fluid (for example toxins, biochemical products, and drugs) that stimulate its chemoreceptors.

What causes vomiting physiology?

The processes of nausea and vomiting result from continuous interactions between the gastrointestinal tract, including its enteric nervous system, the CNS, and the autonomic nervous system [9,10]. Central and peripheral anatomical sites involved in nausea and vomiting induced by various stimuli.May 28, 2021

Where is the chemoreceptor trigger zone CTZ for vomiting?

Chemotherapy-induced nausea and vomiting (CINV) is triggered by stimulation of the chemoreceptor trigger zone (CTZ), which is located in the area postrema in the floor of the 4th ventricle of the brain (Figure 1¹). It is sensitive to chemical stimulation from cerebral spinal fluid and blood.

What medication treats nausea and vomiting work by affecting the chemoreceptor trigger zone?

Metoclopramide (Reglan, Metozolv)

Metoclopramide functions as an antiemetic by blocking dopamine receptors in the chemoreceptor trigger zone of the central nervous system.Jan 17, 2020

Does dopamine induce vomiting?

Here we report marked increases in circulating levels of dopamine during typical vomiting crises suggesting that activation of the dopamine receptors in the chemoreceptor trigger zone of the brainstem may be the likely mechanism of vomiting.

How does the vomiting centre work?

Which brain centre initiates and controls the act of emesis?

…by two distinct brain centres—the vomiting centre and the chemoreceptor trigger zone—both located in the medulla oblongata. The vomiting centre initiates and controls the act of emesis, which involves a series of contractions of the smooth muscles lining the digestive tract.