Semispinalis capitis is a long paired muscle that belongs to the deep layer of muscles of the back. It forms the superior, and largest, component of the three-part semispinalis muscle. With semispinalis cervicis and semispinalis thoracis forming the middle and inferior divisions of the muscle, respectively. There is no lumbar spine division for the semispinalis muscle. Origin: Articular processes of vertebrae C4-C7, transverse processes of vertebrae T1-T6 Insertion: Between superior and inferior

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