Sternocleidomastoid muscle

Origin of Sternocleidomastoid

Manubrium and medial portion of the clavicle.

Insertion of Sternocleidomastoid

Mastoid process of the temporal bone, superior nuchal line.

Muscle Action/Function of Sternocleidomastoid

Unilaterally; cervical rotation to opposite side, cervical lateral flexion to same sideBilaterally; cervical flexion, raises the sternum and assists in forced inhalation.

Arterial (Blood) Supply of Sternocleidomastoid

Occipital artery and the superior thyroid artery.
sternocleidomastoid muscle, anatomy, muscle picture

Sternocleidomastoid Video

Sternocleidomastoid (SCM) Muscle
Neck 2353850150406126921

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