Muscle Origin on scapula Attachment on humerus Function
Supraspinatus muscle supraspinous fossa greater tubercle abducts the arm
Infraspinatus muscle infraspinous fossa greater tubercle laterally rotates the arm
Teres minor muscle lateral border greater tubercle laterally rotates the arm
Subscapularis muscle subscapular fossa lesser tubercle medially rotates the humerus
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