The internal anal sphincter consists of smooth muscle and maintains 70% of the resting anal tone. The external anal sphincter consists of striated muscle and accounts for the remaining 30% of resting ...
Anal sphincter defects are a common cause of faecal incontinence, with obstetric injuries in female patients accounting for the majority. [15] The results from previous studies [4,5] show that early ...
The lower esophageal sphincter and the crural diaphragm constitute the intrinsic and extrinsic sphincter, respectively. The two sphincters are anatomically superimposed on each other and are anchored ...
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