Sternocleidomastoid muscle treatment using the Tend Focus. Origins Sternal head: superior part of anterior surface of manubrium sterni Clavicular head: superior surface of medial third of the clavicle Insertions Lateral surface of mastoid process of the temporal bone, Lateral half of superior nuchal line of the occipital bone. Functions Unilateral contraction: cervical spine: neck ipsilateral flexion, neck contralateral rotation Bilateral contraction: atlantooccipital joint/ superior cervical sp

The sternocleidomastoid muscle is a two-headed neck muscle, which true to its name bears attachments to the manubrium of sternum (sterno-), the clavicle (-cleido-), and the mastoid process of the temporal bone (-mastoid). It is a long, bilateral muscle of the neck, which functions to flex the nethe sternum (sterno-), the clavicle (-cleido-), and the mastoid process of the temporal bone (-mastoid). The muscle is closely related to certain neurovascular structures that pass through the neck on the

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