Actions of Shoulder Muscles

Question 1

What are the shoulder external rotators?

Answer 1

• Posterior cuff (Supraspinatus, Infraspinatus, Teres minor)
• Posterior Deltoid

Question 2

What are the shoulder internal rotators?

Answer 2

• Anterior cuff (subscapularis)
• Anterior deltoid
• Latissimus Dorsi
• Teres Major
• Pec Major

Question 3

What are the shoulder abductors?

Answer 3

All Deltoids
Supraspinatus (very minor)

Question 4

What are the shoulder adductors?

Answer 4

• Latissimus Dorsi
• Teres Major
• Sternal head of Pec Major
• Pec Minor

Question 5

What are the shoulder flexors?

Answer 5

• Clavicular head of Pec Major
• Coracobrachialis
• Anterior Deltoid
• Biceps (weak shoulder flexor)

Question 6

What are the shoulder extenders?

Answer 6

• Latissimus Dorsi
• Teres Major
• Posterior deltoid