<prompt> False about sternocleidomastoid isArises from sternum and clavicleInses on mastoid processMotor supply by spinal accessory nerveTilt the head on opposite side  <response>: Actions of sternocleidomastoid - When one sternocleidomastoid muscle contracts, a It turn the chin to the opposite side, b It can also tilt the head towards the shoulder of same side Ref : B D Chaurasias Human Anatomy , sixth edition, volume 3 , pg. no. 89 