The splenius capitis is a broad, straplike muscle in the back of the neck. It pulls on the base of the skull from vertebrae in the neck and upper thorax.

In human anatomy, the sternocleidomastoid muscle ( /ˌstɜrnɵˌkliːdɵˈmæstɔɪd/), also known as sternomastoid and commonly abbreviated as SCM, is a paired muscle in the superficial layers of the anterior portion of the neck.