where does the sternocleidomastoid muscle insert
In human anatomy, the sternocleidomastoid muscle (/ËstÉrnÉµËklaÉªdÉµËmaestÉÉªd/), ËstÉrnÉµËklaÉªdÉµËmÃ¦stÉÉªd also known as sternomastoid and commonly abbreviated AS, scm is a paired muscle in the superficial layers of the side of the. Neck it is one of the largest and most superficial cervical. muscleshe sternocleidomastoid is innervated by the accessory nerve. It is given the name sternocleidomastoid because it originates at the manubrium of the sternum (sterno-) and the clavicle (cleido-), and has an insertion at the mastoid process of the temporal bone of the skull.