Sternocleidomastoid (SCM) | Structure, Origin, Insertion, & More

The video tutorial provides an in-depth look at the sternocleidomastoid muscle, covering its anatomy, including origin and insertion points, blood supply, and innervation. It explains how to palpate and visualize the muscle, especially during neck rotation. The tutorial also details the muscle's actions, such as cervical rotation and flexion, and its role in forced inhalation. The sternocleidomastoid is primarily innervated by the spinal accessory nerve and receives blood from the occipital and superior thyroid arteries.

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