Sternocleidomastoid

Joe Muscolino

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ATTACHMENTS:

  • The sternocleidomastoid attaches from the sternum and medial clavicle to the mastoid process of the temporal bone and the lateral half of the superior nuchal line of the occiput.

 

ACTIONS:

  • The sternocleidomastoid flexes the lower neck, extends the head and upper neck, and laterally flexes and contralaterally rotates the head and neck at the spinal joints. It also elevates the sternum and clavicle.