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anal sphincter

   Also found in: Medical, Encyclopedia, Wikipedia, Hutchinson 0.02 sec.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.anal sphincter - 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


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? Mentioned in ? References in periodicals archive
 
Another category includes defecatory disorders which are often the result of pelvic-floor or anal sphincter dysfunction.
In the absence of bowel disease, the most common cause of faecal incontinence is damage to the anal sphincter.
 
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