sternocleidomastoid muscle

(redirected from Sternomastoid 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"
References in periodicals archive ?
When the patient swallowed, a transient swelling raised up on the neck over the junction of the upper two-thirds and the lower third of the sternomastoid muscle.
A huge midline mass was visible in his neck extending from the level of the cricoids cartilage superiorly to 1 cm below the sternal notch inferiorly and to the posterior border of the sternomastoid muscle laterally.
The tumors arose in the liver (3 cases), pleura (1 case), lung (1 case), skin of left knee and scalp (1 case each), anterior mediastinum (1 case), and right sternomastoid muscle (1 case).