Retroperistalsis is the reverse of the involuntary smooth muscle contractions of peristalsis. It usually occurs as a precursor to vomiting.

Peristalsis moves food through the gastrointestinal tract from the esophagus in the direction of the anus.

Local irritation of the stomach, such as bacteria or food poisoning, activates the emetic center of the brain which in turn signals an imminent vomiting reflex, food moves in the opposite direction, often from the duodenum of the small intestine into the stomach.

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Look at other dictionaries:

  • retroperistalsis — noun The reverse of the involuntary smooth muscle contractions of peristalsis, usually as a precursor to vomiting …   Wiktionary

  • retroperistalsis — ret·ro·per·i·stal·sis (ret″ro per″ĭ stawlґsis) reversed peristalsis …   Medical dictionary

  • Vomiting — Emesis redirects here. For the butterfly genus, see Emesis (genus). Heaving redirects here. For the up and down motion, see Heave. Puke redirects here. For the district in Albania, see Pukë District. For the town in Albania, see Pukë. Vomiting …   Wikipedia

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