sternocleidomastoid
  胸鎖乳突的; 胸鎖乳突肌
  ster·no·clei·do·mas·toid /ˌstɝnoˌklaɪdəˈmæsˌtɔɪd/ 名詞
  胸鎖乳突的
  sternocleidomastoid
       n : 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 [syn: sternocleidomastoid
           muscle, sternocleido mastoideus, musculus
           sternocleidomastoideus]