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Sphincter Anal

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Définition Le sphincter anal définit un muscle situé au niveau de la partie terminale du tube digestif. Il permet la défécation. Il existe à ce niveau du corps

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Medical definition of anal sphincter: either of two sphincters controlling the closing of the anus:—

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cardiac sphincter a sphincter between the esophagus and the stomach, opening at the approach of food that can then be swept into the stomach by rhythmic peristaltic

Anal stenosis means that the anal opening is too small or does not relax or open properly. This may be treated with surgery that enlarges the anal opening.

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Check out this image and learn more on MedlinePlus: Anal sphincter anatomy

The external anal sphincter (or sphincter ani externus) is a flat plane of muscular fibers, elliptical in shape and intimately adherent to the skin surrounding the

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The lower anal canal and the anal opening are composed of two muscular constrictions that regulate fecal passage. The internal sphincter is part of the inner surface

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The anal sphincter is a group of muscles at the end of the rectum that surround the anus and control the release of stool, thereby maintaining continence.

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Normal Anal Sphincter Anatomy and Age- and Sex-related Variations at High-Spatial-Resolution Endoanal MR Imaging

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A sphincter is a circular muscle that normally maintains constriction of a natural body passage or orifice and which relaxes as required by normal physiological

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