Sternocleidomastoid – Functional Anatomy
Sternocleidomastoid Anatomy. The sternocleidomastoid is a two-headed muscle that extends obliquely along the lateral neck. Origin: The sternal head attaches to the superior aspect of the manubrium. The clavicular head attaches to the medial third of the clavicle. Insertion: Both heads merge and attach to the mastoid process of the temporal bone and lateral third …