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Gross Anatomy II NYCC > Wrist and Palm > Flashcards

Wrist and Palm Flashcards

1
Q

surface anatomy

what is the crease at the base of the fingers called?

A

interdigital fold

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2
Q

surface anatomy

What are the 2 areas at the base of the palm called?

A

hypothenar eminence
thenar eminence

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3
Q

name the carpal bones

A

scaphoid
lunate
triquetrum
pisiform
trapezium
trapezoid
capitate
hamate

“Some Lovers Try Positions That They Can’t Handle”

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4
Q

Describe the cutaneous innervation of the palm by the ulnar nerve

A

5th digit & 1/2 of 4th digit

(tea fingers)

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5
Q

Describe the cutaneous innervation of the palm by the median nerve

A

1st, 2nd, 3rd digits, 1/2 of 4th digit

(tea fingers)

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6
Q

Describe the cutaneous innervation of the palm by the radial nerve

A

superficial branch of radial n innervates small area of proximal thenar eminence area

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7
Q

C8 dermatome of the palm

A

4th & 5th digits

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8
Q

C7 dermatome of the palm

A

3rd (middle) digit

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9
Q

C6 dermatome of the palm

A

1st & 2nd digits

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10
Q

how do palmar branches of the ulnar & median nerves travel in the wrist?

A

do not pass under flexor retinaculum or through carpal tunnel

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11
Q

describe the cutaneous innervation of the palm by the lateral antebrachial cutaneous nerve

A

lateral/radial aspect of wrist

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12
Q

cutaneous innervation of the palm

palmar branches of the median and ulnar nerves supply cutaneous innervation to…

A

base of palm (ulnar side and medial palm)

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13
Q

origin of palmaris brevis

A

palmar aponeurosis & flexor retinaculum

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14
Q

insertion of palmaris brevis

A

skin of ulnar side of palm

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15
Q

innervation of palmaris brevis

A

superficial branch of ulnar nerve

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16
Q

action of palmaris brevis

A

wrinkles & tenses skin over hypothenar eminance

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17
Q

where does flexor retinaculum attach medially?

A

hook of hamate & pisiform

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18
Q

where does flexor retinaculum attach laterally?

A

scaphoid & trapezium

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19
Q

what structure forms the roof of the carpal tunnel?

A

flexor retinaculum

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20
Q

what structure forms the lateral border of the carpal tunnel?

A

tubercles of scaphoid & trapezium

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21
Q

what structure forms the medial border of the carpal tunnel?

A

hook of hamate & pisiform

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22
Q

what structure forms the floor of the carpal tunnel?

A

palmar ulnocarpal & radiocarpal ligaments

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23
Q

describe the contents of the carpal tunnel

A
  • 4 tendons of flexor digitorum superficialis
  • 4 tendons flexor digitorum profundus
  • flexor pollicis longus
  • flexor carpi radialis
  • median nerve
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24
Q

hamate & capitate are connected by ____

A

interosseous ligament

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25
Q

describe the contents of canal of Guyon

A
  • flexor carpi ulnaris
  • ulnar nerve
  • ulnar artery
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26
Q

as the ulnar artery enters the hand, it braches into…

A

superficial & deep palmar branches of ulnar artery

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27
Q

as the radial artery enters the hand, it branches into…

A

superficial & deep palmar branches of radial artery

28
Q

the deep palmar branch of the ulnar artery anastamoses with the ____ forming the ____

A

deep palmar branch of radial artery
deep palmar arch

29
Q

the deep palmar arch is mostly supplied by the ____ artery

A

radial

30
Q

the superficial palmar arch branches into…

A
  • 3 common palmar digital aa
  • 1 proper digital a (5th digit)
31
Q

common palmar digital arteries branch into ____

A

proper palmar digital arteries

32
Q

the superficial palmar arch anastamoses with the ____

A

superficial palmar branch of radial artery

33
Q

the deep palmar arch branches into…

A
  • 1 princeps pollicis artery
  • 3 palmar metacarpal arteries
34
Q

describe the median nerve as it travels deep to the palmar aponeurosis

A
  • median n
  • common palmar digital nn & recurrent branches of median n
  • proper palmar digital nn
35
Q

as the ulnar nerve enters the wrist deep to the palmar aponeurosis, it branches into…

A

deep & superficial branches ulnar n

36
Q

superficial branch of ulnar nerve branches into…

A
  • 1 proper palmar digital n
  • 1 common palmar digital n -> proper
37
Q

name the muscles innervated by branches of the median n

A
  • abductor pollicis brevis
  • flexor pollicis brevis
  • opponens pollicis
  • 1st & 2nd lumbricals
38
Q

origin & insertion of abductor pollicis brevis

A

O: flexor retinaculum & tubercle of trapezium
I: base of proximal phalynx of thumb

39
Q

innervation of abductor pollicis brevis

A

recurrent branches of median n (c8, T1)

40
Q

action of abductor pollicis brevis

A

abduct the thumb

41
Q

origin & insertion of flexor pollicis brevis

A

O: deep - trapezoid & capitate
superficial - flexor retinaculum & tubercle of trapezium

I: base of proximal phalynx of thumb

42
Q

innervation of flexor pollicis brevis

A

recurrent branch of median n (C8, T1)

43
Q

action of flexor pollicis brevis

A

flexes carpometacarpal & metacarpophalangeal joint of thumb

44
Q

origin & insertion of opponens pollicis

A

O: flexor retinaculum, scaphoid, trapezium
I: entire length of lateral border of metacarpal bone

45
Q

innervation of opponens pollicis

A

recurrent branches of median n (C8, T1) (sometimes deep branch of ulnar n)

46
Q

action of opponens pollicis

A

opposes thumb to other fingers

47
Q

origin & insertion of abductor digiti minimi

A

O: pisiform & tendon of flexor carpi ulnaris
I: base of proximal phalynx of 5th digit

48
Q

innervation of abductor digiti minimi

A

deep branch of ulnar n (C8, T1)

49
Q

action of abductor digiti minimi

A

abducts 5th digit

50
Q

origin & insertion of flexor digiti minimi

A

O: hamulus of hamate & flexor retinaculum
I: base of proximal phalynx of 5th digit

51
Q

innervation of flexor digiti minimi

A

deep branch of ulnar n (C8, T1)

52
Q

action of flexor digiti minimi

A

flexes 5th digit

53
Q

origin & insertion of opponens digiti minimi

A

O: hamulus of hamate & flexor retinaculum
I: ulnar side of 5th metacarpal

54
Q

innervation of opponens digiti minimi

A

deep branch ulnar n (C8, T1)

55
Q

action of opponens digiti minimi

A

opposes 5th digit to thumb

56
Q

origin & insertion of lumbricals

A

O: 4 tendons of flexor digitorum profundus
I: radial side of dorsal digital expansion of 2nd-5th digits

57
Q

innervation of lumbricals

A

radial/1st & 2nd: median n
ulnar/3rd & 4th: deep branch of ulnar n
(C8, T1)

58
Q

action of lumbricals

A
  • flex metacarpophalangeal jts (make an ‘L’)
  • extend interphalangeal jts (when flexed)
59
Q

origin & insertion of adductor pollicis

A

O: oblique - capitate & bases of 2nd & 3rd metacarpal bones
transverse - palmar surface of 3rd metacarpals

I: ulnar side of base of proximal phalynx of thumb

60
Q

innervation of adductor pollicis

A

deep branch of ulnar nerve (C8, T1)

61
Q

action of adductor pollicis

A

adduct thumb

62
Q

origin & insertion of palmar interossei

A

O: 1st - ulnar side of 2nd metacarpal
2nd & 3rd - radial side of 4th & 5th metacarpals

I: 1st - ulnar side of base of 2nd proximal phalynx
2nd & 3rd - radial side of base of 4th & 5th proximal phalanges

63
Q

innervation of palmar interossei

A

deep branch of ulnar n (C8, T1)

64
Q

action of palmar interossei

A

adduct digits 5, 4, 2
assist lumbricals
(‘3PAD’)

65
Q

origin & insertion of dorsal interossei

A

O: arise by 2 heads from adjacent sides of metacarpals

I: 1st & 2nd - radial side of bases of 2nd & 3rd proximal phalanges & dorsal digital expansion
3rd & 4th: ulnar side of bases of 3rd & 4th proximal phalanges & dorsal digital expansion

66
Q

innervation of dorsal interossei

A

deep branch of ulnar nerve (C8, T1)

67
Q

action of dorsal interossei

A

abduct medial 4 digits & assist lumbricals
(‘4DAB’)

Gross Anatomy II NYCC (18 decks)

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