Deep muscles of the back. Semispinalis muscles labeled. Semispinalis capitis is the upper of the labeled ones.
|Latin||Musculus semispinalis capitis|
|Origin||Transverse processes of lower cervical and higher thoracic columna|
|Insertion||Area between superior and inferior nuchal line|
|Nerve||Greater occipital nerve|
|Actions||Extends the head|
|Anatomical terms of muscle|
The semispinalis capitis (complexus) is situated at the upper and back part of the neck, deep to the splenius, and medial to the longissimus cervicis and capitis. It is part of the transversospinales muscle group.
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 vertebrae, and from the articular processes of the three cervical vertebrae above this (C4-C6).
It lies deep to the trapezius muscle and can be palpated as firm round muscle mass just lateral to the cervical spinous processes.
The semispinalis muscles are innervated by the dorsal rami of the cervical spinal nerves.
- Anatomy figure: 01:06-01 at Human Anatomy Online, SUNY Downstate Medical Center
- Anatomy figure: 24:01-01 at Human Anatomy Online, SUNY Downstate Medical Center
- Semispinalis_capitis_1 at the Duke University Health System's Orthopedics program
- lesson6musclesofback at The Anatomy Lesson by Wesley Norman (Georgetown University)
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