Sternocleidomastoid muscle

The sternocleidomastoid muscle with nearby structures labeled, such as the triangles of the neck.

In human anatomy, the sternocleidomastoid muscle (/ˌstɜːrnoʊˌklaɪdəˈmæsˌtɔɪd, -nə-, -doʊ-/), 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 muscles. The primary actions of the muscle are rotation of the head to the opposite side and flexion of the neck. The sternocleidomastoid is innervated by the accessory nerve.

单词	Musculus sternocleidomastoideus
释义	Musculus sternocleidomastoideus 英语百科 Sternocleidomastoid muscle In human anatomy, the sternocleidomastoid muscle (/ˌstɜːrnoʊˌklaɪdəˈmæsˌtɔɪd, -nə-, -doʊ-/), 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 muscles. The primary actions of the muscle are rotation of the head to the opposite side and flexion of the neck. The sternocleidomastoid is innervated by the accessory nerve.
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Musculus sternocleidomastoideus

Sternocleidomastoid muscle