Rotator Cuff Muscles

Question 1

Supraspinatus

Answer 1

Suprascapular nerve
Abducts arm initially (before action of deltoid)
Most common rotator cuff injury

Question 2

Infraspinatus

Answer 2

Suprascapular nerve
Laterally rotates arm
Pitching injury

Question 3

teres minor

Answer 3

Axillary nerve

Adducts and laterally rotates arm

Question 4

Subscapularis

Answer 4

Upper and lower subscapular nerves

Medially rotates and adducts arm