Central mechanisms of vomiting

Area of Science:

• Neuroscience
• Gastroenterology

Background:

• Nausea and vomiting (emesis) are complex physiological responses triggered by various stimuli.
• The brainstem coordinates the physical act of vomiting, involving specific neuronal pathways.
• Higher brain centers and the area postrema also play roles in emesis.

Purpose of the Study:

• To explore the neuroanatomical basis of nausea and vomiting.
• To identify potential therapeutic targets for managing nausea and vomiting, particularly in cyclic vomiting syndrome.

Main Methods:

• Review of neuroanatomical pathways involved in emesis.
• Discussion of potential therapeutic interventions based on their action on central emetic mechanisms.

Main Results:

• The brainstem, including the nucleus of the solitary tract and ventrolateral medulla, is central to vomiting coordination.
• The cerebral cortex is implicated in the sensation of nausea.
• Experimental drugs (NK-1 receptor antagonists, 5-HT1A receptor agonists) and P6 acustimulation show efficacy.

Conclusions:

• Effective treatments for nausea and vomiting, especially in cyclic vomiting syndrome, may target central emetic pathways.
• NK-1 receptor antagonists, 5-HT1A receptor agonists, and P6 acustimulation represent promising therapeutic strategies.