Semispinalis capitis
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Semispinalis capitis | ||
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Section of the neck at about the level of the sixth cervical vertebra. Showing the arrangement of the fascia coli. (Semispinalis capitis visible at bottom right.) | ||
Deep muscles of the back. (Semispinalis capitis visible at top center right.) | ||
Latin | musculus semispinalis capitis | |
Gray's | subject #115 400 | |
Origin: | Transversal process of lower cervical and higher thoracal columna | |
Insertion: | Area between superior and inferior nuchal line | |
Artery: | ||
Nerve: | Greater occipital nerve | |
Action: | Extend the head | |
Dorlands/Elsevier | m_22/12550702 |
The Semispinalis capitis (Complexus) is situated at the upper and back part of the neck, beneath the Splenius, and medial to the Longissimus cervicis and capitis.
It arises by a series of tendons from the tips of the transverse processes of the upper six or seven thoracic and the seventh cervical vertebræ, and from the articular processes of the three cervical above this.
The tendons, uniting, form a broad muscle, which passes upward, and is inserted between the superior and inferior nuchal lines of the occipital bone.
The medial part, usually more or less distinct from the remainder of the muscle, is frequently termed the Spinalis capitis; it is also named the Biventer cervicis since it is traversed by an imperfect tendinous inscription.
[edit] Additional images
[edit] External links
- SUNY Figs 01:06-01
- SUNY Figs 24:01-01
- Duke Orthopedics semispinalis_capitis_1
- Norman/Georgetown lesson6musclesofback
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 As such, some of the information contained herein may be outdated.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)