详细解释:【医】 胸锁乳实的
英语解释：
名词 sternocleidomastoid:
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同义词：sternocleidomastoid muscle, sternocleido mastoideus, musculus sternocleidomastoideus