sphincter ani

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ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sphincter ani - the sphincter muscle of the anus
anus - the excretory opening at the end of the alimentary canal
anatomical sphincter, sphincter, sphincter muscle - a ring of muscle that contracts to close an opening
musculus sphincter ani externus - an external ring of striated muscle surrounding the anus
musculus sphincter ani internus - an internal ring of smooth muscle formed by circular fibers of the rectum
References in periodicals archive ?
They say man has succeeded where the animal fails because of the clever use of his hands, yet when compared to the hands, the sphincter ani (anal sphincter) is far superior.
Myofascial trigger points in pelvic muscles, including the levator ani, sphincter ani, and obturator internus as well as muscles of the urogenital diaphragm, often cause or contribute to chronic pelvic pain, said Ms.