SHOULDER MUSCLES

Question 1

Adduct and medially rotate arm

Answer 1

Pectoralis Major m.

Question 2

Stabilize scapula against thoracic wall
-Depress and rotate scapula

Pull shoulder forward

Answer 2

Pectoralis Minor m.

Question 3

Principle abductor of arm 0-90°

• Anterior part: flexes/medially rotates
• Middle part: abducts
• Posterior part: extends/laterally rotates

Answer 3

Deltoid m.

Question 4

Abduct arm 0-90°

Fix humeral head in glenoid fossa

Answer 4

Supraspinatus m.

Question 5

Laterally rotate humerus

Holds humeral head in glenoid
cavity (avoids dislocation)

Answer 5

Infraspinatus m.

Question 6

Medially rotate

Adducts arm 90-0°

Answer 6

Subscapularis m.

Question 7

Laterally rotates arm

Holds humeral head in glenoid fossa

Answer 7

Teres Minor m.

Question 8

Adduct/medially rotate arm

Answer 8

Teres Major m.

Question 9

rotates scapula

Keep scapula fixed against rib cage

Raise ribs when scapula is fixed
-When punching or reaching anteriorly

abducts arm 90-180°

Answer 9

Serratus Anterior m.

Question 10

Enables humeral rotation

Strength and muscular endurance

Maintains/stabilizes humeral head

Answer 10

Rotator Cuff