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coccygeus muscle


Definition: striated pelvic muscle associated with the deep (pelvic) aspect of the sacrospinous ligament, forming part of the pelvic diaphragm; origin, spine of ischium and sacrospinous ligament; insertion, sides of lower part of sacrum and upper part of coccyx; action, with the sacrospinous ligament assists in support of pelvic floor, theoretically increasingly so when intra-abdominal pressures increase; nerve supply, third and fourth sacral.

Synonym(s): musculus coccygeusTA, coccygeal muscle, ischiococcygeus, musculus ischiococcygeus

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