Trapezius muscle
muscle between the lower spine and the shoulder blade / From Wikipedia, the free encyclopedia
In human, trapezius muscle or trapezius is a large muscle that extends longitudinally on the upper portion of a human spine. Its functions are to move the scapulae and support the arm.
The trapezius has three functional regions: the superior region, which supports the weight of the arm; the intermediate region, which retracts the scapulae; and the inferior region, which rotates and depresses the scapulae.