Sternocleidomastoid
SCM · Neck
- Origin
- Manubrium of the sternum and medial clavicle
- Insertion
- Mastoid process and the lateral superior nuchal line
- Action
- Flexes the neck, bends it to the same side and rotates the head to the opposite side
The rope-like muscle on each side of the neck, visible when you turn your head.
Sternocleidomastoid anatomy page →