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PLICAE RECTI
The three or four crescentic folds placed horizontally in the rectalmucous membrane; the superior rectalfold is located around the beginning of the rectum on the left side; the mediumrectalfold (Nelaton's fold) is most prominent and consistent and projects from the rightside about 8 cm above the anus (approximately the level of the floor of the rectouterine or rectovesical pouch); the inferiorrectalfold is on the leftside about 5 cm above the anus.
Synonym: plicae transversales recti, Houston's folds, Houston's valves, Kohlrausch's valves, plicae recti, rectal folds, rectal valves.