What is the meaning of sternocleidomastoid muscle?

One of two thick muscles running from the sternum and clavicle to the mastoid and occipital bone; turns head obliquely to the opposite side; when acting together they flex the neck and extend the head.
- synonyms: sternocleidomastoid, sternocleido mastoideus, musculus sternocleidomastoideus

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APA	WordNet. (2010). sternocleidomastoid muscle. Retrieved October 1, 2026, from http://smartdefine.org/sternocleidomastoid_muscle/definitions/1313146
Chicago	WordNet. 2010. "sternocleidomastoid muscle" http://smartdefine.org/sternocleidomastoid_muscle/definitions/1313146 (accessed October 1, 2026).
Harvard	WordNet 2010, sternocleidomastoid muscle, Smart Define, viewed 1 October, 2026, <http://smartdefine.org/sternocleidomastoid_muscle/definitions/1313146>.
MLA	WordNet. "sternocleidomastoid muscle" 23 October 2010. Web. 1 October 2026. <http://smartdefine.org/sternocleidomastoid_muscle/definitions/1313146>

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