semispinalis capitis muscle

sem·i·spi·nal·is cap·i·tis mus·cle

(sem'ē-spī-nā'lis kap'i-tis mŭs'ĕl) Origin, transverse processes of five or six upper thoracic and articular processes of four lower cervical vertebrae; insertion, occipital bone between superior and inferior nuchal lines; action, rotates head and draws it backward; nerve supply, dorsal primary rami of cervical spinal nerves.
Synonym(s): musculus semispinalis capitis [TA] .