Joint/Limb Actions

Question 1

what muscles perform lateral rotation of the scapula

Answer 1

trapezius (upper and lower fibres), serratus anterior

Question 2

what muscles perform medial rotation of the scapula

Answer 2

rhomboids, levator scapulae

Question 3

what muscles perform protraction of the scapula

Answer 3

serratus anterior, pectoralis minor, subclavius

Question 4

what muscles perform retraction of the scapula

Answer 4

rhomboids, trapezius (upper fibres)

Question 5

what muscles perform elevation of the scapula

Answer 5

levator scapulae, trapezius (upper fibres), rhomboids

Question 6

what muscles perform depression of the scapula

Answer 6

pectoralis minor, trapezius (lower fibres), serratus anterior, subclavius

Question 7

what muscles perform flexion of the shoulder

Answer 7

pectoralis major, anterior deltoid, biceps brachii (long head), coracobrachialis

Question 8

what muscles perform extension of the shoulder

Answer 8

latissimus dorsi, teres major, pectoralis major, posterior deltoid, teres minor, infraspinatus, triceps brachii (long head)

Question 9

what muscles perform medial rotation of the shoulder

Answer 9

subscapularis, teres major, latissimus dorsi, pectoralis major, anterior deltoid

Question 10

what muscles perform lateral rotation of the shoulder

Answer 10

teres minor, infraspinatus, posterior deltoid

Question 11

what muscles perform abduction of the shoulder

Answer 11

supraspinatus, deltoid (middle fibres)

Question 12

what muscles perform adduction of the shoulder

Answer 12

coracobrachialis, pectoralis major, latissimus dorsi, teres major

Question 13

what muscles perform flexion of the elbow

Answer 13

biceps brachii, brachialis, brachioradialis, pronator teres

Question 14

what muscles perform extension of the elbow

Answer 14

triceps brachii, anconeus

Question 15

what muscles perform supination of the elbow

Answer 15

supinator, biceps brachii, brachioradialis

Question 16

what muscles perform pronation of the elbow

Answer 16

pronator teres, pronator quadratus, brachioradialis

Question 17

what are the wrist movements

Answer 17

flexion (80-90º), extension (70-90º), radial deviation (15º), ulnar deviation (30-45º)

Question 18

what are the finger movements

Answer 18

flexion, extension, adduction, abduction

Question 19

what are the thumb movements

Answer 19

flexion, extension, adduction, abduction, opposition, reposition

Question 20

what muscles perform wrist flexion

Answer 20

palmaris longus
flexor capri radialis
flexor carpi ulnaris
flexor digitorum superficialis
flexor digitorum profundus
flexor pollicis longus

Question 21

what muscles perform wrist extension

Answer 21

extensor carpi radialis brevis, extensor carpi radialis longus, extensor carpi ulnaris

Question 22

what muscles perform radial deviation

Answer 22

flexor carpi radialis
extensor carpi radialis longus
extensor carpi radialis brevis
abductor pollicis longus

Question 23

what muscles perform ulnar deviation

Answer 23

flexor carpi ulnaris, extensor carpi ulnaris

Question 24

what muscles perform finger flexion

Answer 24

flexor digitorum superficialis, flexor digitorum profundus

Question 25

what muscles perform finger extension

Answer 25

extensor digitorum, extensor indicis, extensor digiti minimi

Question 26

what muscles perform finger abduction

Answer 26

dorsal interossei (DAB)

Question 27

what muscles perform finger adduction

Answer 27

palmar interossei (PAD)

Question 28

what muscles perform thumb flexion

Answer 28

flexor pollicis longus

Question 29

what muscles perform thumb extension

Answer 29

extensor pollicis longus, extensor pollicis brevis, abductor pollicis longus

Question 30

what muscles perform thumb abduction

Answer 30

abductor pollicis longus, abductor pollicis brevis

Question 31

what muscles perform thumb adduction

Answer 31

adductor pollicis brevis

Question 32

what muscles perform thumb opposition

Answer 32

opponens pollicis

Question 33

what muscles perform thumb reposition

Answer 33

abductor pollicis longus, extensor pollicis longus

Question 34

what muscles originate at the medial epicondyle (5)

Answer 34

``` pronator teres palmaris longus flexor digitorum superficialis flexor carpi ulnaris flexor carpi radialis ```

Question 35

what muscles originate at the lateral epicondyle (6)

Answer 35

``` anconeous supinator extensor carpi radialis brevis extensor carpi ulnaris extensor digitorum extensor digiti minimi ```