The Scapular muscles
The scapula is highly mobile. It is unique for having two articulations on the same side of the bone; most of the bones in the body come to a joint at opposite ends. This arrangement allows the scapula great freedom of movement across the back.
The group referred to in this volume as the scapular muscles includes only the muscles lying on the surface of the scapula below its spine, which are close to the skin. Most of them move the arm. The muscles that raise the scapula make their appearance further up on the body and will be discussed in the section on the neck. Supraspinatus, which lies above the spine of the scapula and in function is a part of this group, will be discussed under trapezius to which it lies deep.