WEEK 4 MCQS

Question 1

which 2 posterior forearm muscles arise above the common extensor origin

Answer 1

brachioradialis + extensor carpi radialis longus

Question 2

the cutaneous nerve supply of the lateral side of the forearm arises from what upper limb main nerve

Answer 2

musculocutaneous

Question 3

what is the usual upper limit of radial deviation at the wrist joint (in degrees)

Answer 3

15

Question 4

in wrist trauma what is the most common carpal bone dissociation

Answer 4

scaphoid + lunate

Question 5

what is the nerve supply to brachioradialis

Answer 5

radial nerve

Question 6

what is the classification of the radiocarpal synovial joint

Answer 6

ellipsoid

Question 7

what nerve supplies the skin of the anatomical snuffbox

Answer 7

the superficial branch of the radial nerve

Question 8

which tendons form the anterior boundary of the anatomical snuffbox

Answer 8

abductor pollicis longus + extensor pollicis brevis

Question 9

what is the most important static stabiliser of the distal radioulnar joint

Answer 9

TFCC - triangular fibrocartilage complex

Question 10

at the elbow the deep branch of the radial nerve passes between the heads of which muscle

Answer 10

supinator

Question 11

which carpal bones articulate with the distal radius

Answer 11

lunate + scaphoid

Question 12

at the elbow on passing into the anterior forearm the ulnar nerve passes between the heads of which muscle

Answer 12

flexor carpi ulnaris

Question 13

the extensor digitorum tendons share an extensor tunnel at the wrist with the tendon of what muscle

Answer 13

extensor indicis

Question 14

which posterior forearm tendons occupy the first extensor tunnel

Answer 14

abductor pollicis longus + extensor polliciis brevis

Question 15

which tendons cross the floor of the anatomical snuff box

Answer 15

extensor carpi radialis longus + brevis

Question 16

which roots represent the dermatomal supply for the medial side of the forearm and elbow

Answer 16

C8+T1

Question 17

an avulsion of the most distal extensor expansion produces what deformity

Answer 17

mallet finger

Question 18

in addition to extension of the digits what is the action of the dorsal interossei muscles of the hand

Answer 18

abduction of the fingers

Question 18

which forearm muscle inserts onto the dorsal surface of the 3rd metacarpal

Answer 18

extensor carpi radialis brevis

Question 19

the common extensor origin is location on which part of the humerus

Answer 19

lateral epicondyle