Upper Limb III: Hand and Wrist

Question 1

most of the flexion of the wrist occurs at which joint?

Answer 1

mid carpal joint (60%)

40% occurs at radoiocarpal joint

Question 2

most of the extension of the wrist occurs at which joint?

Answer 2

radoiocarpal joint (67%)

Question 3

these form a moveable hood over the MP and IP joints of the fingers referred to as the extensor expansion

Answer 3

extensor tendons

Question 4

what travels in the carpal tunnel

Answer 4

median nerve 
f digitorum superficialis 
f digitorum profundus 
f. retinaculum 
f. carpi radialis

Question 5

what is dupuytren’s contracture

Answer 5

progressive shortening and thickening of palmar fascia that pulls 4th and 5th digits into partial flexion

tends to be hereditary

Question 6

long tendons of what muscles enter the hand

Answer 6

flexor digitorum superficialis

flexor digitorum profundus

Question 7

ulnar bursa

Answer 7

flexor sheath beneath the flexor retinaculum where the long tendons of f. digitorum superciialis enter

Question 8

tensosynovitis

Answer 8

infection to the synovial sheaths that cause inflammation of the tendon and synovial sheath

if in the 5th digit, it can spread into carpal tunnel and into forearm

Question 9

extensor tendons form a moveable hood where? what is this called?

Answer 9

MP and IP, called extensor expansion

attaches dorsal digital expansion to the extensor muscles and intrinsic hand muscles

Question 10

Thenar eminence is composed of which three muscles

Answer 10

abductor pollicis brevis
flexor pollicis brevis
opponens pollicis

Question 11

intrinsic thenar muscles (2)

Answer 11

thenar eminence (3 of them)
adductor pollicis

Question 12

two heads of the adductor pollicis

Answer 12

oblique head

transverse head

Question 13

two heads of flexor pollicis brevis

Answer 13

superficial head

deep head

Question 14

hypothenar eminence is composed of what 3 muscles

Answer 14

flexor digiti minimi
abductor digiti minimi
opponens digiti minimi

Question 15

proximal attachment of opponens pollicis

Answer 15

flexor rentinaculum and tubercles of scaphoid and trapezium

Question 16

distal attachment of opponens pollicis

Answer 16

lateral side of 1st metacarpal

Question 17

actions of opponens pollicis

Answer 17

oppose thumb and medially rotate 1st metacarpal

Question 18

innervation of opponens pollicis

Answer 18

recurrent branch of median nerve

Question 19

proximal attachment of abductor pollicis brevis

Answer 19

flexor retinaculum and tubercles of scaphoid and trapezium