Anatomy of the hand Flashcards

deck complete

1
Q

bones of the hand

A

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

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2
Q

bones making up wrist

A

distal end of ulna and radius
meet 8 carpal bones

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3
Q

joints of the hand

A

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

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4
Q

proximal carpal bones

A

pisiform
triquetrum
lunate
scaphoid

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5
Q

distal carpal bones

A

hamate
capitate
trapezoid
trapezium

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6
Q

muscles of the hand

A

extrinsic and intrinsic

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7
Q

function of extrinsic muscles of hand

A

origins within forearm
responsible for power grips

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8
Q

function of intrinsic muscles of hand

A

origins within hand
responsible for precision grips

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9
Q

extrinsic muscles of the hand

A

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

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10
Q

intrinsic muscles of the hand

A

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

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11
Q

superficial layer of the hand

A

palmar aponeurosis
palmar brevis
thenar eminence

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12
Q

muscles and innervation of thenar eminence

A

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

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13
Q

adductor pollicis

A

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

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14
Q

muscles and innervation of hypothenar eminence

A

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

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15
Q

meaning of digiti minimi

A

of the 5th digit

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16
Q

meaning of interossei

A

in between bone

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17
Q

lumbrical muscles

A

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

18
Q

palmar and dorsal interossei

A

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

19
Q

blood supply to hand

A

radial and ulnar arteries

20
Q

blood supply in hand

A

superficial and deep palmar arches

21
Q

what supplies superficial palmar arch

A

ulnar artery

22
Q

what supplies deep palmar arch

A

radial artery

23
Q

venous drainage of hand

A

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

24
Q

motor innervation of median nerve

A

thenar eminence and lateral 2 lumbrical muscles

25
sensory innervation of median nerve
palm of hand and lateral 2 digits
26
motor innervation of ulnar nerve
hypothenar muscles, medial 2 lumbricals, interossei, adductor pollicis muscles
27
sensory innervation of ulnar nerve
medial 2 digits
28
motor innervation of thenar eminence
median nerve
29
motor innervation of hypothenar eminence
ulnar nerve
30
motor innervation of adductor pollicis muscles
ulnar nerve
31
motor innervation of lumbricals 1 and 2
median nerve
32
motor innervation of lumbricals 3 and 4
ulnar nerve
33
motor innervation of interossei
ulnar nerve
34
motor innervation of palmaris brevis
ulnar nerve
35
what is the carpal tunnel
fibroosseus tunnel fibro part - roof osseus part - floor formed by carpal arch - floor - and flexor retinaculum - roof
36
structures of the carpal tunnel
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
37
contents of anatomical snuffbox
radial artery base of first metacarpal scaphoid trapezium radial styloid process cephalic vein
38
extensor pollicis longus
long extensor of thumb attaches to base of distal phalanx
39
abductor pollicis longus
long abductor of thumb attaches to base of first metacarpal
40
extensor pollicis brevis
short extensor of the thumb attaches to base of proximal phalanx