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Backward movement toward the midline of the body; moving the scapula back toward the spine during retraction of the shoulder girdle. Typically accompanies Shoulder External Rotation, Transverse Abduction, and Tranverse Extension. 1  Trapezius (middle fibers). 2  Trapezius (lower fibers).
The scapula, or shoulder blade, is shaped like a triangle and attaches the arm bone to the bones of the ribs. Strenuous activity and exercise may cause scapula pain. Scapula pain may be caused by sleeping position. Medication and massage therapy can be used to treat scapula pain.