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Related to reverse peristalsis: antiperistalsis
reverse peristalsisAntiperistalsis A wave of contraction of GI tract smooth muscle which moves contents orally
Peristalsis in a direction opposite to the normal direction. Synonym: antiperistalsis
See also: peristalsis
the wormlike movement by which the alimentary canal or other tubular organs with both longitudinal and circular muscle fibers propel their contents, consisting of a wave of contraction passing along the tube. Increased peristalsis means faster movement of ingesta through the gut and less absorption of fluid, both tending to diarrhea. Reduced peristalsis means a longer alimentary sojourn, greater inspissation of ingesta and a tendency to constipation. See also peristaltic, paralytic ileus.
peristalsis directed orally is a result of intestinal obstruction and acute, significant distention of the intestinal lumen; it is a major contributing mechanism in vomiting.