Coccygeus muscle

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Coccygeus muscle
Left Levator ani from within.
Latin musculus coccygeus
Sacrospinous ligament and ischial spine
Lateral margin of coccyx and related border of sacrum
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
Gray's p.424
TA A04.5.04.011
FMA FMA:19088
Anatomical terms of muscle

The Coccygeus is a muscle of 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[edit]


  1. ^ Essential Clinical Anatomy. K.L. Moore & A.M. Agur. Lippincott, 2 ed. 2002. Page 217
  2. ^ Origin, insertion and nerve supply of the muscle at Loyola University Chicago Stritch School of Medicine
  3. ^ "". Retrieved 2007-12-09. 

External links[edit]

This article incorporates text from a public domain edition of Gray's Anatomy.