ROTATOR CUFF & SHOULDER

Subscapularis (origin)

Subscapular fossa

Subscapularis (insertion)

Lesser tubercle

Subscapularis (action)

Medially rotate arm, stabilize humerus head in glenoid cavity

Teres major (origin)

posterior surface of scapula at inferior angle

Teres major (insertion)

Lesser tubercle crest

Teres major (action)

Medially rotate, extend, adduct arm

Teres minor (origin)

Dorsal scapular surface lateral border

Teres minor (insertion)

Greater tubercle

Teres minor (action)

Laterally rotate arm, stabilize humerus head in glenoid cavity

Supraspinatus (origin)

Supraspinous fossa

Supraspinatus (insertion)

Greater tubercle

Supraspinatus (action)

Abduction of arm, stabilize shoulder joint

Infraspinatus (origin)

Infraspinous fossa

Infraspinatus (insertion)

Greater tubercle

Infraspinatus (action)

Laterally rotate arm, stabilize humerus head in glenoid cavity