- Coccygeus muscle
Coccygeus muscle 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  or S3-S4 Actions pulls coccyx forward after defecation, closing in the back part of the outlet of the pelvis
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.
- SUNY Labs 43:16-0103 - "The Female Pelvis: Muscles of the Pelvic Diaphragm"
- Cross section at UV pelvis/pelvis-e12-15
- pelvis at The Anatomy Lesson by Wesley Norman (Georgetown University) (femalepelvicdiaphragm, malepelvicdiaphragm)
- Coccyx pain, tailbone pain, coccydynia (Peer-reviewed medical chapter, available free online at eMedicine)
List of muscles of abdominopelvic cavity (TA A04.5, GA 4.408) Abdomen/
lateralMuscleFasciaInguinal ligament (Pectineal ligament, Lacunar ligament, Reflected ligament)PosteriorMuscleFascia
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