1. Deltoid 2. Pectoralis major 3. Lattisimus dorsi 4. Teres Major 5. Supraspinatus 6. Infraspinatus 7. Teres minor 8. subscapularis ALL have insertions on humerus and therefore cause movement of the humerus

 Action: Abduction of the arm O I

 Action: flexion, adduction and medial rotation O I

 Action: extension, adduction, medial rotation O I I

 Action: adduction, medial rotation O I

 Rotator cuff muscle  Action: abduction  Assists the deltoid O I

 Rotator Cuff Muscle  Action: lateral rotation O I

 Rotator Cuff Muscle  Action: lateral rotation O I

 Rotator Cuff Muscle  Action: medial rotation O I

 Pectoantebrachialis  Xiphihumeralis Both superficial ventral muscles Same actions as pectoralis major

 Deltoid  Latissimus dorsi  Supraspinatus  Infraspinatus  Teres minor  Teres major

 Deltoid  Pectoralis major

Trapezius Pectoralis Minor Serratus Anterior Internal Intercostals Deltoid Pectoralis Major Connective tissue Tendinous sheet External obliquesInternal obliques Rectus Abdominus Transverse Abdominus

Trapezius Rhomboid Major Levator Scapulae Deltoid Latissimus dorsi supraspinatus infraspinatus Teres minor Teres Major