splenius capitis muscle

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sple·ni·us cap·i·tis mus·cle

(splē'nē-ŭs kap'i-tis mŭs'ĕl)
Origin, from ligamentum nuchae of last four cervical vertebrae and supraspinous ligament of first and second thoracic vertebrae; insertion, lateral half of superior nuchal line and mastoid process; action, rotates head and extends neck; nerve supply, dorsal primary rami of second to sixth cervical spinal nerves.
Synonym(s): musculus splenius capitis [TA] , splenius muscle of head.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
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In long-standing cases of focal dystonia, such as spasmodic cervical torticollis, selective peripheral denervation of the sternocleidomastoid muscle, trapezius and splenius capitis muscles in the neck can lead to significant improvement in the torticollis (the Bertrand procedure).