- Coccygeus muscle
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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 [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
- ^ Essential Clinical Anatomy. K.L. Moore & A.M. Agur. Lippincott, 2 ed. 2002. Page 217
- ^ LUC coc
- ^ "uams.edu". http://anatomy.uams.edu/AnatomyHTML/muscles_pelvis&perineum.html. Retrieved 2007-12-09.
External links
- 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)
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 As such, some of the information contained within it may be outdated.
List of muscles of abdominopelvic cavity (TA A04.5, GA 4.408) Abdomen/
wallAnterior/
lateralMuscleFasciaFascia/abdominal fascia: panniculus adiposus (Fascia of Camper) · stratum membranosum (Fascia of Scarpa) · Transversalis fascia (Interfoveolar ligament)
Linea alba · Linea semilunaris · Inguinal triangle
Inguinal canal (Deep inguinal ring, Superficial inguinal ring, Intercrural fibers, Crura of superficial inguinal ring)
Inguinal ligament (Pectineal ligament, Lacunar ligament, Reflected ligament)PosteriorMuscleFasciaPelvis MuscleFasciafascia/pelvic fascia visceral (Rectovaginal fascia, Rectoprostatic fascia) · parietal (Obturator fascia/Tendinous arch, Piriformis fascia)
floor/diaphragm: Superior fascia of pelvic diaphragm (Pubovesical ligament, Puboprostatic ligament) · Inferior fascia of pelvic diaphragm
Anococcygeal bodyCategories:- Muscles of the torso
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