sternocleidomastoid muscle

(redirected from Sternocleidomastoideus)
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Related to Sternocleidomastoideus: sternocleidomastoid muscle
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Noun1.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
skeletal muscle, striated muscle - a muscle that is connected at either or both ends to a bone and so move parts of the skeleton; a muscle that is characterized by transverse stripes
cervix, neck - the part of an organism (human or animal) that connects the head to the rest of the body; "he admired her long graceful neck"; "the horse won by a neck"
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