使头部前推或转动的肌肉

每块胸锁乳突肌从胸骨延伸到颈两侧耳朵下面的一点,还连接到锁骨和头骨的颞骨上。当这两块肌肉收缩时,将头部向前拉。若只有一块收缩时,可使头部转动。

〈人体学习百科〉 猫头鹰出版社 ISBN 957-9684-11-1

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.