Coccygeus muscle

From Wikipedia, the free encyclopedia

Coccygeus muscle
Left Levator ani from within.
Latin	musculus coccygeus
Gray's	subject #119 424
Origin	Sacrospinous ligament
Insertion
Artery:
Nerve:	sacral nerves: S4, S5 [1][2] or S3-S4[3]
Action:	closing in the back part of the outlet of the pelvis
Dorlands /Elsevier	m_22/12548603

The Coccygeus is situated behind the levator ani.

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.

It assists the Levator ani and Piriformis in closing in the back part of the outlet of the pelvis.

[edit] See also

• Coccyx
• Coccydynia (coccyx pain, tailbone pain)
• Pubococcygeus muscle

[edit] References

[edit] External links

• SUNY Labs 43:16-0103 - "The Female Pelvis: Muscles of the Pelvic Diaphragm"
• Cross section at UV pelvis/pelvis-e12-15
• Norman/Georgetown pelvis (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 As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

v • d • e List of muscles of torso BACK splenius (capitis, cervicis) - erector spinae (iliocostalis, longissimus, spinalis) - latissimus dorsi transversospinales: (semispinalis dorsi, semispinalis cervicis, semispinalis capitis, multifidus, rotatores) - interspinales - intertransversarii SUBOCCIPITAL rectus capitis posterior (major, minor) - obliquus capitis (inferior, superior) CHEST intercostales (external, internal, innermost) - subcostales - transversus thoracis - levatores costarum - serratus posterior (inferior, superior) - diaphragm ABDOMEN anterior/lateral wall: obliques (external, internal) - transversus abdominis - rectus abdominis - pyramidalis posterior wall: quadratus lumborum - psoas major/psoas minor - iliacus cremaster PELVIS/FLOOR levator ani (iliococcygeus, pubococcygeus, puborectalis) - coccygeus PERINEUM anal triangle: sphincter ani (externus, internus) superficial perineal pouch (superficial transverse perineal, bulbospongiosus, ischiocavernosus) deep perineal pouch (deep transverse perineal, sphincter urethrae membranaceae)