Coccygeus muscle

The Coccygeus or ischiococcygeus is a muscle of the pelvic floor, located posterior to levator ani and anterior to the sacrospinous ligament.

Coccygeus muscle
Left Levator ani from within.
OriginSacrospinous ligament and ischial spine
InsertionLateral margin of coccyx and related border of sacrum
NervePudendal nerve; sacral nerves: S4, S5[1] or S3-S4[2]
Actionspulls coccyx forward after defecation, closing in the back part of the outlet of the pelvis
Latinmusculus coccygeus
Anatomical terms of muscle

It is a triangular plane of muscular and tendinous fibers, arising by its apex from the spine of the ischium and sacrospinous ligament, and inserted by its base into the margin of the coccyx and into the side of the lowest piece of the sacrum.

In combination with the levator ani, it forms the pelvic diaphragm.

It assists the levator ani and piriformis in closing in the back part of the outlet of the pelvis.

See also


This article incorporates text in the public domain from page 424 of the 20th edition of Gray's Anatomy (1918)

  1. Essential Clinical Anatomy. K.L. Moore & A.M. Agur. Lippincott, 2 ed. 2002. Page 217
  2. "". Retrieved 2007-12-09.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.