Origin
Clavicle and the manubrium of the sternum.
Insertion
Temporal bone – mastoid process and the superior nuchal line.
Blood supply
Occipital artery, superior thyroid artery.
Nerve supply
Accessory nerve, cervical plexus.
Action
The sternocleidomastoid helps to rotate the neck and in head tilting.
Disease/Injury
Torticollis or wry neck is a condition in which the head becomes fixed in a bent position towards either side.
Muscle exercise
NA
Interesting facts
Contraction of this muscle on each side causes the face to turn to the other side.
