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deep transverse perineal muscle


Definition: origin, ramus of ischium; insertion, with its fellow in the perineal body; action, with superficial transverse perineal muscle in forming the transverse element of cross-member (the sagittal element being formed by bulbospongiosus and external anal sphincter muscles) that provides support of the perineum and the pelvic diaphragm above it during increased abdominopelvic pressure; in males, it adds support to the bulb of the penis; nerve supply, pudendal (dorsal nerve of penis/clitoris).

Synonym(s): musculus transversus perinei profundusTA, deep transverse muscle of perineum

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.