Rotatores muscle
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Rotatores muscle | ||
---|---|---|
Latin | musculi rotatores | |
Gray's | subject #115 400 | |
Origin: | transverse process | |
Insertion: | spinous process | |
Artery: | ||
Nerve: | posterior branch | |
Action: | ||
Dorlands/Elsevier | m_22/12550562 |
The Rotatores (Rotatores spinae) lie beneath the Multifidus and are found only in the thoracic region; they are eleven in number on either side.
Each muscle is small and somewhat quadrilateral in form; it arises from the upper and back part of the transverse process, and is inserted into the lower border and lateral surface of the lamina of the vertebra above, the fibers extending as far as the root of the spinous process.
The first is found between the first and second thoracic vertebræ; the last, between the eleventh and twelfth.
Sometimes the number of these muscles is diminished by the absence of one or more from the upper or lower end.
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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 As such, some of the information contained herein may be outdated.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.
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: obliques (external, internal) - transversus abdominis - rectus abdominis - pyramidalis - cremaster - quadratus lumborum
PELVIS: levator ani (iliococcygeus, pubococcygeus, puborectalis) - coccygeus
PERINEUM: sphincter ani (externus, internus) - superficial perineal pouch (transversus perinei superficialis - bulbospongiosus - ischiocavernosus) - deep perineal pouch (transversus perinei profundus, sphincter urethrae membranaceae)