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Coccygeus muscle
Muscle of the lower back arising by its apex from the spine of the ischium From Wikipedia, the free encyclopedia
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The coccygeus muscle or ischiococcygeus is a muscle of the pelvic floor located posterior to levator ani and anterior to the sacrospinous ligament.
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Structure
The coccygeus muscle is posterior to levator ani and anterior to the sacrospinous ligament in the pelvic floor. It is a triangular plane of muscular and tendinous fibers. It arises by its apex from the spine of the ischium and sacrospinous ligament.[3][4] It is inserted by its base into the margin of the coccyx and into the side of the lowest piece of the sacrum.[3][4]
In combination with the levator ani, it forms the pelvic diaphragm.[5]
The pudendal nerve runs between the coccygeus muscle and the piriformis muscle, superficial to the coccygeus muscle.[6]
Nerve supply
The coccygeus muscle is innervated by the pudendal nerve, which runs between it and the piriformis muscle.[7]
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Function
The coccygeus muscle assists the levator ani and piriformis muscle in closing in the back part of the outlet of the pelvis.[8] This helps to support the vagina in women, and the other pelvic organs.[8]
See also
References
External links
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