rectosigmoid sphincter

rec·to·sig·moid sphinc·ter

a circular band of muscular fibers at the rectosigmoid junction.

rectosigmoid sphincter

circular muscle fibers in the wall of the large intestine at the junction of the sigmoid colon and rectum. Also called O'Beirne's sphincter.

O'Bierne,

James, Irish surgeon, 1786-1862.
O'Bierne sphincter - a circular band of muscular fibers at the rectosigmoid junction. Synonym(s): rectosigmoid sphincter
O'Bierne tube
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