splenius1.jpg

Origin: Inferior half of ligamentum nuchae (C3-cC) and spinus processes of C7-T3 (possibly to T6). Insertion: Superior nuchal line of occipital bone and mastoid process of temporal bone.

Actions: Bilateral action: Extends head and neck. Unilateral action: Laterally flexes and rotates head and neck to the same side.

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