Shoulder Manual Muscle Testing

Shoulder flexion to 90

Coracobrachialis

Anterior deltoid

Extension

Latissimus dorsi

Teres major

Posterior deltoid

Abduction to 90

Middle deltoid

Supraspinatus

Horizontal adduction

Pectoral is major upper fibers

Pectoralis major lower fibers

External rotation

Internal rotation

Teres major

Latissimus dorsi internal rotation

Subscapularis