Anatomy of the hand

Question 1

bones of the hand

Answer 1

8 carpals
5 metacarpals
14 phalanges - proximal, middle and distal

Question 2

bones making up wrist

Answer 2

distal end of ulna and radius
meet 8 carpal bones

Question 3

joints of the hand

Answer 3

radiocarpal - radius to carpal
midcarpal - carpal to carpal
carpometacarpal - carpal to metacarpal
metacarpophalangeal - metacarpal to phalanx
interphalangeal - plalanx to phalanx
- 1 in thumb
- 2 in fingers: proximal and distal

Question 4

proximal carpal bones

Answer 4

pisiform
triquetrum
lunate
scaphoid

Question 5

distal carpal bones

Answer 5

hamate
capitate
trapezoid
trapezium

Question 6

muscles of the hand

Answer 6

extrinsic and intrinsic

Question 7

function of extrinsic muscles of hand

Answer 7

origins within forearm
responsible for power grips

Question 8

function of intrinsic muscles of hand

Answer 8

origins within hand
responsible for precision grips

Question 9

extrinsic muscles of the hand

Answer 9

flexor digitorum superficialis - 4 tendons
flexor digitorum profundus - 4 tendons
flexor pollicis longus - 1 tendon

Question 10

intrinsic muscles of the hand

Answer 10

muscles of the thumb
muscles of the 5th digit
4 x lumbricals
7 x interossei

Question 11

superficial layer of the hand

Answer 11

palmar aponeurosis
palmar brevis
thenar eminence

Question 12

muscles and innervation of thenar eminence

Answer 12

abductor pollicis brevis
flexor pollicis brevis
opponens pollicis
reccurrent branch of median nerve

Question 13

adductor pollicis

Answer 13

located deep to thenar eminence
transverse and oblique heads
innervated by ulnar nerve

Question 14

muscles and innervation of hypothenar eminence

Answer 14

abductor digiti minimi
flexor digiti minimi brevis
opponens digiti minimi
ulnar nerve

Question 15

meaning of digiti minimi

Answer 15

of the 5th digit

Question 16

meaning of interossei

Answer 16

in between bone

Question 17

lumbrical muscles

Answer 17

originate on the tendons of FDP
attach to extensor expansion on radial side
flex metacarpophalangeal joints
extend interphalangeal joints

lateral 2 innervated my median nerve
medial 2 innervated by ulnar nerve

Question 18

palmar and dorsal interossei

Answer 18

3x palmar - adduction
4x dorsal - abduction
think PAD-DAB
innervated by ulnar nerve

Question 19

blood supply to hand

Answer 19

radial and ulnar arteries

Question 20

blood supply in hand

Answer 20

superficial and deep palmar arches

Question 21

what supplies superficial palmar arch

Answer 21

ulnar artery

Question 22

what supplies deep palmar arch

Answer 22

radial artery

Question 23

venous drainage of hand

Answer 23

dorsal venous network > basilic veins > deep arm (brachial veins) > axillary vein
or
dorsal venous network > cephalic vein > axillary vein

Question 24

motor innervation of median nerve

Answer 24

thenar eminence and lateral 2 lumbrical muscles

Question 25

sensory innervation of median nerve

Answer 25

palm of hand and lateral 2 digits

Question 26

motor innervation of ulnar nerve

Answer 26

hypothenar muscles, medial 2 lumbricals, interossei, adductor pollicis muscles

Question 27

sensory innervation of ulnar nerve

Answer 27

medial 2 digits

Question 28

motor innervation of thenar eminence

Answer 28

median nerve

Question 29

motor innervation of hypothenar eminence

Answer 29

ulnar nerve

Question 30

motor innervation of adductor pollicis muscles

Answer 30

ulnar nerve

Question 31

motor innervation of lumbricals 1 and 2

Answer 31

median nerve

Question 32

motor innervation of lumbricals 3 and 4

Answer 32

ulnar nerve

Question 33

motor innervation of interossei

Answer 33

ulnar nerve

Question 34

motor innervation of palmaris brevis

Answer 34

ulnar nerve

Question 35

what is the carpal tunnel

Answer 35

fibroosseus tunnel
fibro part - roof
osseus part - floor
formed by carpal arch - floor - and flexor retinaculum - roof

Question 36

structures of the carpal tunnel

Answer 36

10 structures
- 4 tendons from flexor digitorum superficialis (FDS)
- 4 tendons from flexor digitorum profundus (FDP)
- 1 tendon from flexor pollicis longus (FPL)
- median nerve

Question 37

contents of anatomical snuffbox

Answer 37

radial artery
base of first metacarpal
scaphoid
trapezium
radial styloid process
cephalic vein

Question 38

extensor pollicis longus

Answer 38

long extensor of thumb
attaches to base of distal phalanx

Question 39

abductor pollicis longus

Answer 39

long abductor of thumb
attaches to base of first metacarpal

Question 40

extensor pollicis brevis

Answer 40

short extensor of the thumb
attaches to base of proximal phalanx