Neck
§Sternocleidomastoid
§Origin: Medial clavicle and manubrium of sternum
§Insertion:
Mastoid process
§Action:
Both sides flex the neck ; Right side rotates to the left and lateral
flexion to the right; Left side rotates to the right and
lateral flexion to the lef
§Nerve:
Spinal accessory (11th Cranial,
C2-3)