Actions--which muscles perform them?

Question 1

Elevate scapula

Answer 1

1) Descending trapezius
2) Rhomboid major
3) Rhomboid minor
4) Levator scapulae

Question 2

Retract scapula

Answer 2

1) Middle/transverse trapezius
2) Rhomboid major
3) Rhomboid minor
4) Latissimus Dorsi

Question 3

Protract scapula

Answer 3

1) Pectoralis minor

2) Serratus anterior

Question 4

Depress scapula

Answer 4

1) Ascending trapezius
2) Serratus anterior
3) Pectoralis minor

Question 5

Upward scapular rotation

Answer 5

1) Ascending trapezius
2) Descending trapezius
3) serratus anterior

Question 6

Downward scapula rotation

Answer 6

1) Pectoralis minor
2) Rhomboid major
3) Rhomboid minor
4) Levator scapulae
5) Latissimus dorsi

Question 7

Extend shoulder

Answer 7

1) Latissimus dorsi
2) Deltoid
3) triceps brachii [posterior arm]

Question 8

Adduct shoulder

Answer 8

1) Latissimus dorsi
2) Teres major
3) Subscapularis

Question 9

Flex shoulder

Answer 9

1) Deltoid
2) Biceps brachii [anterior arm]
3) Coracobrachialis [anterior arm]

Question 10

Abduct shoulder

Answer 10

1) Supraspinatus

2) Deltoid

Question 11

Medially rotate humerus

Answer 11

1) Latissumus dorsi
2) Teres major
3) Subscapularis

Question 12

Laterally rotate humerus

Answer 12

1) Infraspinatus

2) Teres minor

Question 13

Flex elbow

Answer 13

1) Biceps brachii [anterior arm]
2) Brachialis [anterior arm]
3) Pronator teres [anterior forearm] WEAK
4) Palmaris longus [anterior forearm] WEAK
5) Brachioradialis [anterior forearm misfit] Weak unless hand midprone

Question 14

Supination

Answer 14

1) Biceps brachii [anterior arm]

2) Supinator [posterior forearm]

Question 15

Extend elbow

Answer 15

1) triceps brachii [posterior arm]

Question 16

Pronation

Answer 16

1) Pronator teres [anterior forearm]

2) Pronator quadratus [anterior forearm]

Question 17

Wrist flexion

Answer 17

1) Flexor carpi radialis [anterior forearm]
2) Palmaris longus [anterior forearm]
3) Flexor carpi ulnaris [anterior forearm]
4) Flexor digitorum profundus [anterior forearm] WEAK

Question 18

Wrist abduction

Answer 18

1) Flexor carpi radialis [anterior forearm]
2) Extensor carpi radialis longus [posterior forearm]
3) Extensor carpi radialis brevis [posterior forearm]

Question 19

Wrist adduction

Answer 19

1) Flexor carpi ulnaris [anterior forearm]

2) Extensor carpi ulnaris [anterior forearm]

Question 20

Interphalangeal joint flexion

Answer 20

1) Flexor digitorum superficialis [anterior forearm]; PIP

2) Flexor digitorum profundus [anterior forearm]; DIP

Question 21

Thumb flexion

Answer 21

1) Flexor pollicis longus [anterior forearm]

2) Flexor pollicis brevis [thenar]

Question 22

Wrist extension

Answer 22

1) Extensor carpi radialis longus [posterior forearm]
2) Extensor carpi radialis brevis [posterior forearm]
3) Extensor digitorum [posterior forearm] WEAK
4) Extensor carpi ulnaris brevis [posterior forearm]
5) Abductor pollicis longus [posterior forearm] WEAK
6) Extensor pollicis brevis [posterior forearm] WEAK
7) Extensor pollicis longus [posterior forearm] WEAK
8) Extensor indicis [posterior forearm] WEAK

Question 23

Metacarpophalangeal extension

Answer 23

1) Extensor digitorum [posterior forearm]
2) Abductor pollicis longus [posterior forearm] THUMB ONLY
3) Extensor pollicis longus [posterior forearm] THUMB ONLY
4) Extensor pollicis brevis [posterior forearm] THUMB ONLY

Question 24

Interphalangeal joint extension

Answer 24

1) Extensor digitorum
2) Extensor pollicis longus [posterior forearm] THUMB ONLY
3) Extensor pollicis brevis [posterior forearm] THUMB ONLY
4) Lumbricals of hand
5) Dorsal interossei (2-4) only

Question 25

Metacarpophalangeal flexion

Answer 25

1) Flexor digitorum superficialis [anterior forearm]
2) Flexor pollicis longus [anterior forearm] THUMB ONLY
3) Lumbrical muscles of hand
4) Dorsal interossei (2-4) only

Question 26

Thumb abduction

Answer 26

1) Abductor pollicis longus [posterior forearm]

2) Abductor pollicis brevis [thenar]

Question 27

Index extension

Answer 27

1) extensor indicis

Question 28

Opposition

Answer 28

1) Opponens digiti minimi

2) Opponens pollicis

Question 29

Finger abduction

Answer 29

1) Abductor digiti minimi (5th only)

2) Dorsal interossei (2-4) only

Question 30

Thumb adduction

Answer 30

1) Adductor policis

Question 31

Finger adduction

Answer 31

1) Palmar interossei (2, 4, and 5 only)