Shoulder actions

Question 1

Trapezius

Answer 1

1) Rotates scapula upward
- Upper: rotates scapula upward
- Middle: retracts (adducts) scapula
- Lower: depresses and upwardly rotates scapula

Question 2

Latissimus Dorsi

Answer 2

1) Shoulder extension
2) Shoulder IR
3) Shoulder adduction
4) Contributes to scapular depression and retraction (adduction)

Question 3

Levator Scapulae

Answer 3

1) Elevation of scapula

2) Downward rotation of scapula

Question 4

Rhomboid Minor

Answer 4

1) Downward rotation of scapula
2) Retraction (adduction of scapula)
3) Elevation of scapula

Question 5

Rhomboid Major

Answer 5

1) Downward rotation of scapula
2) Retraction (adduction ) of scapula
3) Elevation of scapula

Question 6

Serratus Posterior Superior

Answer 6

Assists in lifting ribs in inspiration

Question 7

Serratus Posterior Inferior

Answer 7

Unclear, may hold lower ribs down during inspiration

Question 8

Serratus Anterior

Answer 8

1) Scapula protraction (abduction)

2) Rotates scapula (glenoid) upward

Question 9

Deltoid

Answer 9

1) Stabilizes GH joint
- Anterior fibers: shoulder flexion and horizontal adduction
- Middle fibers: shoulder abduction
- Posterior fibers: shoulder extension and horizontal abduction

Question 10

Subscapularis

Answer 10

1) Stabilizes GH joint

2) Shoulder IR

Question 11

Supraspinatus

Answer 11

1) Stabilizes GH joint
2) Shoulder abduction
3) Depresses humeral head during abduction

Question 12

Infraspinatus

Answer 12

1) Stabilizes GH joint

2) Shoulder ER

Question 13

Teres Minor

Answer 13

1) Stabilizes joint

2) Shoulder ER

Question 14

Teres Major

Answer 14

1) Shoulder IR
2) Shoulder adduction
3) Shoulder extension

Question 15

Coracobrachialis

Answer 15

1) Shoulder flexion

2) Shoulder adduction

Question 16

Biceps Brachii

Answer 16

1) Elbow flexion
2) Forearm supination
3) Shoulder flexion

Question 17

Triceps Brachii

Answer 17

1) Elbow extension

2) Long head can adduct and extend shoulder

Question 18

Pectoralis Major

Answer 18

1) Shoulder adduction/horizontal adduction
2) Shoulder flexion
3) Shoulder IR

Question 19

Pectoralis Minor

Answer 19

1) Protraction of scapula

2) Scapular depression

Question 20

Subclavius

Answer 20

Elevates 1st rib