(anatomy) A muscle arising from the transverse processes of the third to sixth cervical vertebrae, inserting on the scalene tubercle of the first rib, and functioning to bend the neck forward and laterally and to rotate it to the side.

(anatomy) A muscle arising from the transverse processes of the lower six cervical vertebrae, inserting on the upper surface of the first rib, and functioning to bend the neck forward and laterally and to rotate it to the side.