The |trapezius| is one of the biggest shoulder muscles and the most superficial muscle on the back of the neck and upper trunk. It is a broad, flat triangular muscle that lies just below the skin, covering the upper back part of the neck and shoulders. It links the neck with the |spine| (dorsal |vertebrae|), |ribs|, and shoulder bones (scapula). This muscle is used to turn and tilt the head, raise and twist the arms, and to shrug or steady the shoulders. The |trapezius| is a postural muscle as well as an active mover.