Wrist and Volar Forearm

Question 1

insertion of pronator teres

Answer 1

lateral radius (distal to supinator insertion)

Question 2

innervation of pronator teres

Answer 2

median n. (C6,C7)

Question 3

action of pronator teres

Answer 3

pronates the forearm, weak elbow flexion

Question 4

origin of flexor carpi radialis

Answer 4

medial epicondyle of humerus

Question 5

insertion of flexor carpi radialis

Answer 5

base of 2nd metacarpal (variance: base of 3rd metacarpal)

Question 6

innervation of flexor carpi radialis

Answer 6

median n. (C6,C7)

Question 7

action of flexor carpi radialis

Answer 7

wrist flexion more radially, radial deviation of hand

Question 8

origin of palmaris longus

Answer 8

medial epicondyle of humerus

Question 9

insertion of palmaris longus

Answer 9

palmar aponeurosis

Question 10

innervation of palmaris longus

Answer 10

median n. (C7,C8)

Question 11

action of palmaris longus

Answer 11

weak flexor of wrist (flexion tightens palmar aponeurosis), weak elbow flexion

Question 12

origin of flexor carpi ulnaris

Answer 12

humeral head: medial epicondyle of humerus

ulnar head: olecranon

Question 13

insertion of flexor carpi ulnaris

Answer 13

pisiform, hook of hamate, base of 5th metacarpal

Question 14

innervation of flexor carpi ulnaris

Answer 14

ulnar n. (C7-T1)

Question 15

action of flexor carpi ulnaris

Answer 15

wrist flexion and ulnar deviation of hand

Question 16

the superficial layer of volar muscles of forearm

Answer 16

pronator teres, flexor carpi radialis, palmaris longus, flexor carpi ulnaris

Question 17

the intermediate layer of volar muscles

Answer 17

flexor digitorum superficialis

Question 18

origin of flexor digitorum superficialis

Answer 18

humeral - ulnar head: medial epicondyle of humerus

radial head: upper half of anterior border of radius

Question 19

insertion of flexor digitorum superficialis

Answer 19

sides of middle phalanges of 2nd to 5th digits

Question 20

innervation of flexor digitorum superficialis

Answer 20

median n. (C8,T1)

Question 21

action of flexor digitorum superficialis

Answer 21

flexes wrist, PIP (proximal interphalangeal) joints

Question 22

origin of pronator teres

Answer 22

humeral head: medial epicondyle of humerus

ulnar head: coronoid process

Question 23

origin of flexor digitorum profundus

Answer 23

ulna (proximal 2/3 of flexor surface) and interosseous mem.

Question 24

insertion of flexor digitorum profundus

Answer 24

distal phalanges of 2nd to 5th digits

Question 25

innervation of flexor digitorum profundus

Answer 25

anterior interosseous branch of the median n. (C8-T1) - 2nd and 3rd phalanges
ulnar n. (C8-T1) - 4th and 5th phalanges

Question 26

action of flexor digitorum profundus

Answer 26

wrist, MCP, PIP, DIP of 2nd to 5th digits flexion

Question 27

origin of flexor pollicis longus

Answer 27

radius (midanterior surface) and adjacent interosseous mem.

Question 28

insertion of flexor pollicis longus

Answer 28

distal phalanx of thumb (palmar surface)

Question 29

innervation of flexor pollicis longus

Answer 29

median n. (C8-T1) (anterior interosseous branch)

Question 30

action of flexor pollicis longus

Answer 30

wrist flexion, radial deviation of hand

carpometacarpal of thumb, MCP, IP - flexion

Question 31

origin of pronator quadratus

Answer 31

distal quarter of ulna

Question 32

insertion of pronator quadrates

Answer 32

distal quarter of radius

Question 33

innervation of pronator quadrates

Answer 33

anterior interosseous branch of the median n. (C8-T1)

Question 34

action of pronator quadrates

Answer 34

hand pronation, distal radioulnar joint stablilization

Question 35

nerve found between medial epicondyle and olecranon

Answer 35

ulnar n.