Coccygeus muscle

Coccygeus muscle
Coccygeus muscle
Gray404.png
Left Levator ani from within.
Latin musculus coccygeus
Gray's subject #119 424
Origin Sacrospinous ligament and ischial spine
Insertion    Lateral margin of coccyx and related border of sacrum
Artery
Nerve sacral nerves: S4, S5 [1][2] or S3-S4[3]
Actions pulls coccyx forward after defecation, closing in the back part of the outlet of the pelvis

The Coccygeus is a muscle of the pelvic wall (i.e. peripheral to the pelvic floor), located posterior to levator ani and anterior to the sacrospinous ligament.

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

References

  1. ^ Essential Clinical Anatomy. K.L. Moore & A.M. Agur. Lippincott, 2 ed. 2002. Page 217
  2. ^ LUC coc
  3. ^ "uams.edu". http://anatomy.uams.edu/AnatomyHTML/muscles_pelvis&perineum.html. Retrieved 2007-12-09. 

External links

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.


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