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Sternocleidomastoid muscle
/stˈɜːnəklˌeɪdəmˌastɔɪd mˈʌsəl/
/stˈɜːnəklˌeɪdəmˌæstɔɪd mˈʌsəl/Sternocleidomastoid muscle
01
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
