Anatomy of Scapula Scapula serves as the attachment site for 17 muscles Its normal function to stabilize the scapula to the thorax, provide power to the upper limb and synchronize glenohumeral motion. Normal Movements : Elevation and Upward rotation By Trapezius muscle. Scapular Protraction (Anterior and Lateral motion) By Serratus anterior and Pectoralis major and minor Read More →