Pectoralis minor
Depresses and protracts shoulder; rotates scapula laterally (downward); elevates ribs if scapula is stationary
Levator scapulae
Elevates scapula
Rhomboid muscles
Adducts and rotates scapula laterally
Seratus anterior
Protracts shoulder; abducts and medially rotates scapula (upward)
Subclavius
Depresses and protracts shoulder
Trapezius
Depends on active region and state of other muscles; may elevate; adduct; depress; rotate scapula and or/ elevate clavicle; can also extend or hyperextend neck
Coracobrachialis
Adduction and flexion at shoulder
Deltoid
Abduction at the shoulder
Latissimus dorsi
Extension, adduction, and medial rotation at shoulder
Pectoralis major
Flexion, adduction and medial rotation at shoulder
Supraspinatus
Abduction at shoulder
Infraspinatus
Lateral rotation at shoulder
Subscapularis
Medial rotation at shoulder
Teres minor
Lateral rotation at shoulder (same as infraspinatus)
Teres major
Adduction and medial rotation at shoulder