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Coccygeus muscle

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] or S3-S4^[2]
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.

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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.

References

^ LUC coc
^ uams.edu. Retrieved on 2007-12-09.

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 As such, some of the information contained herein may be outdated.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)