Medical Definition of Houston's valve
: any of the usually three but sometimes four or two permanent transverse semilunar folds of the rectum—called also plica transversalis recti
Biographical Note for houston's valve
John (1802–1845), British surgeon. Houston described the permanent transverse folds of the rectum in 1830. In that same year he reported his discovery of two muscles that compress the dorsal vein of the penis. He was also the author of papers on edema and fevers.
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