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Origin: sternum, clavicle. Insertion: Mastoid process of temporal bone. Action: Unilateral: turns head to opposite side. Bilateral: flexes neck
Unilateral: turns head to opposite side. Bilateral: flexes neck
What is the action of the sternocleidomastoid?
Origin: sternum. Insertion: hyoid. Action: Depresses larynx and hyoid during speaking and swallowing
Origin: sternum. Insertion: thyroid cartilage. Action: Depresses larynx and hyoid during speaking and swallowing
Origin: mandible. Insertion: hyoid. Action: elevates and protrude hyoid (widens pharynx during swallowing)
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