muscles of the upper limb

Question 1

Pectoralis major is innervated by?

Answer 1

lateral pectoral nerve

Question 2

Actions of the pectoralis major

Answer 2

• adduction, internal rotation

- flexion, assist in respiration when shoulder is fixed

Question 3

Actions of the deltoid?

Answer 3

• flexion and medial rotation of glenohumeral joint
• abduction of glenohumeral joint
• extension and lateral rotation of glenohumeral joint

Question 4

Innervation of biceps brachii?

Answer 4

musculocutaneous nerve

Question 5

Actions of the biceps brachii?

Answer 5

• flexion; supination of elbow

- flexion, abduction, and internal rotation of the humerus

Question 6

Innervation of the coracobrachialis?

Answer 6

musculocutaneous nerve

Question 7

Actions of the coracobrachialis?

Answer 7

flexion, adduction, internal rotation

Question 8

Innervation of the brachialis?

Answer 8

musculocutaneous nerve

Question 9

Brachialis actions?

Answer 9

flexion at elbow

Question 10

Actions of the anconeus?

Answer 10

extends the elbow and tightens its joint

Question 11

Actions of the extensor carpi radialis longus?

Answer 11

Elbow: weak flexion
wrist: extension and abduction

Question 12

Innervation of the extensor carpi radialis longus?

Answer 12

radial nerve

Question 13

Actions of the extensor carpi radialis brevis?

Answer 13

elbow: weak flexion
wrist: extension and abduction

Question 14

Innervation of the extensory carpi radialis brevis?

Answer 14

radial nerve

Question 15

Actions of the extensor digitorum?

Answer 15

Wrist: extension

Extension and abduction of fingers (2-5)

Question 16

Innervation of the extensor digitorum?

Answer 16

radial nerve

Question 17

Actions of the extensor digiti minimi?

Answer 17

Wrist: extension, ulnar abduction of hand

Question 18

Innervation of the extensor digiti minimi?

Answer 18

radial nerve

Question 19

Actions of the extensor carpi ulnaris?

Answer 19

Wrist: extension, adduction of hand

Question 20

Innervation of the extensor carpi ulnaris?

Answer 20

radial nerve

Question 21

Actions of the supinator?

Answer 21

supination

Question 22

Innervation of the supinator?

Answer 22

radial nerve

Question 23

Actions of the abductor pollicis longus?

Answer 23

abduction of hand and carpometacarpal joint of thumb

Question 24

innervation of the abductor pollicis longus?

Answer 24

radial nerve

Question 25

Actions of the extensor pollicis longus?

Answer 25

wrist: extension and abduction of hand
adduction of joints of thumb
extension of joints of thumb

Question 26

Innervation of the extensor pollicis longus?

Answer 26

radial nerve

Question 27

Actions of the extensor pollicis brevis?

Answer 27

abduction of hand

extension of thumb

Question 28

Innervation of the extensor pollicis brevis?

Answer 28

radial nerve

Question 29

Actions of the extensor indicis?

Answer 29

wrist: extension

Extension of 2nd digit

Question 30

Innervation of the extensor indicis?

Answer 30

radial nerve

Question 31

Actions of the brachioradialis?

Answer 31

Elbow: flexion
Forearm: semipronation

Question 32

Innervation of the brachioradialis?

Answer 32

radial nerve

Question 33

Actions of the flexor digitorum superficialis?

Answer 33

elbow: weak flexion

Flexion of wrist, MCP, and PIP joints of 2nd to 5th digits

Question 34

Innervation of the flexor digitorum superficialis?

Answer 34

median

Question 35

Actions of the flexor digitorum profundus?

Answer 35

wrist, MCP, PIP, and DIP joints of 2nd to 5th: flexion

Question 36

Innervation of the flexor digitorum profundus?

Answer 36

Median (radial half of fingers 2 and 3)

Ulnar (ulnar half of fingers 4 and 5)

Question 37

Actions of the flexor pollicis longus?

Answer 37

Wrist: flexion and abduction of hand

Question 38

Innervation of the flexor pollicis longus?

Answer 38

median nerve

Question 39

Actions of the flexor carpi ulnaris?

Answer 39

wrist: flexion and adduction of hand

Question 40

Innervation of the flexor carpi ulnaris?

Answer 40

ulnar nerve

Question 41

Actions of the pronator quadratus?

Answer 41

Hand: pronation

Stabilization of distal radioulnar joint

Question 42

Innervation of pronator quadratus?

Answer 42

median