KnowraAnal sphincterLinked fromLinked fromThe 6 pages that link to Anal sphincter, each with the reason it gives.All 6Broader topic 3Related 2Compared with 1Fecal incontinenceBroader topic: Weakness or injury in these muscles can prevent the closure needed to retain stool.Anorectal manometryBroader topic: Manometry records the resting and voluntary pressures generated by these muscles.AnusBroader topic: The internal and external sphincters close the opening and relax during defecation.