Internal anal sphincter image
Pictures Of Anal Sphincter, External
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Anatomy of the anal sphincters | SpringerLink
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The internal sphincter is part of the inner surface of the canal; it is composed of concentric layers of circular muscle tissue and is not under voluntary control. The external sphincter is a layer of voluntary (striated) muscle encircling the outside wall of the anal canal.
The Sphincter ani internus (Internal sphincter ani) is a muscular ring which surrounds about cm. of the anal canal; its inferior border is in contact with, but quite separate from, the Sphincter ani externus. It is about 5 mm. thick, and is formed Schema Rectum image Internal anal sphincter · MRI Axial image Internal anal.
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Description:A recent application of endosonography in the evaluation of anal sphincter morphology has led to controversy about the possibility of precisely assessing the diameter of external and internal anal sphincter muscles. On the other hand, magnetic resonance imaging MRI has been proposed to allow a more detailed view of the anatomy of the pelvic floor. However, both techniques have not yet been compared directly. Anal ultrasound was performed using a 7.