Surf Wiki
Save to docs
general/muscles-of-the-torso

From Surf Wiki (app.surf) — the open knowledge base

Coccygeus muscle

Muscle of the lower back arising by its apex from the spine of the ischium

Summary

Muscle of the lower back arising by its apex from the spine of the ischium

FieldValue
NameCoccygeus muscle
Latinmusculus coccygeus
ImageGray404.png
CaptionLeft levator ani from within.
OriginSacrospinous ligament and ischial spine
InsertionLateral margin of coccyx and related border of sacrum
NervePudendal nerve; sacral nerves: S4, S5 or S3-S4
ActionPulls coccyx forward after defecation, closing in the back part of the outlet of the pelvis

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

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. It is 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.

The pudendal nerve runs between the coccygeus muscle and the piriformis muscle, superficial to the coccygeus muscle.

Nerve supply

The coccygeus muscle is innervated by the pudendal nerve, which runs between it and the piriformis muscle.

Function

The coccygeus muscle assists the levator ani and piriformis muscle in closing in the back part of the outlet of the pelvis. This helps to support the vagina in women, and the other pelvic organs.

References

References

  1. Essential Clinical Anatomy. K.L. Moore & A.M. Agur. Lippincott, 2 ed. 2002. Page 217
  2. "uams.edu".
  3. (2007-01-01). "CHAPTER 51 - Lower Urinary Tract Disorders in Postmenopausal Women". Academic Press.
  4. (2007-01-01). "Chapter 23 - Pelvic Organ Prolapse and Pelvic Floor Dysfunction". Mosby.
  5. (2015-01-01). "Chapter 13 - Host Response to Biomaterials for Pelvic Floor Reconstruction". Academic Press.
  6. (2008-01-01). "Chapter 24 - PUDENDAL NERVE STIMULATION". W.B. Saunders.
  7. (2008-01-01). "11 - Lower extremity nerve injuries". W.B. Saunders.
  8. Muir, Tristi W.. (2008-01-01). "Chapter 74 - POSTERIOR WALL PROLAPSE: SEGMENTAL DEFECT REPAIR". W.B. Saunders.
Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

muscles-of-the-torso
Want to explore this topic further?

Ask Mako anything about Coccygeus muscle — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report