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Anatomy > 22. The Hand > Flashcards

22. The Hand Flashcards

1
Q

What type of joint are the interphalangeal joints?

A

Synovial hinge

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2
Q

What type of joint are the metacarpophalangeal joints?

A

Synovial condyloid

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3
Q

What type of joint are the carpometacarpal joints?

A

Thumb - synovial saddle

Digits - synovial plane

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4
Q

What type of joint are the intercarpal joints?

A

Synovial plane

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5
Q

What muscle tenses the palmar aponeurosis?

A

Palmaris longus

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6
Q

Origin of palmaris brevis?

A

Palmar aponeurosis

Flexor retinaculum

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7
Q

Insertion of palmaris brevis?

A

Dermis

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8
Q

Function of palmaris brevis?

A

Grip

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9
Q

Innervation of palmaris brevis?

A

Superficial ulnar nerve C8, T1

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10
Q

What are the muscles at the thenar eminance?

A

Abductor pollicis brevis
Flexor pollicis brevis
Opponens pollicis

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11
Q

Origin of abductor pollicis brevis?

A

Scaphoid

Trapezium

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12
Q

Insertion of abductor pollicis brevis?

A

Base of proximal phalanx of thumb

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13
Q

Function of abductor pollicis brevis?

A

CMC joint abduction

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14
Q

Innervation of abductor pollicis brevis?

A

Recurrent median nerve C8, T1

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15
Q

Origin of flexor pollicis brevis?

A

,Flexor retinaculum
Capitate
Trapzium

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16
Q

Insertion of flexor pollicis brevis?

A

Base of proximal phalanx of thumb

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17
Q

Function of flexor pollicis brevis?

A

CMC joint flexion

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18
Q

Innervation of flexor pollicis brevis?

A

Recurrent median nerve C8, T1

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19
Q

Origin of opponens pollicis?

A

Trapezium

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20
Q

Insertion of opponens pollicis?

A

First metacarpal

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21
Q

Function of opponens pollicis?

A

CMC joint opposition

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22
Q

Innervation of opponens pollicis?

A

Recurrent median nerve C8, T1

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23
Q

Origin of adductor pollicis?

A

Transverse head - 3rd metacarpal

Oblique head - capitate and 2nd/3rd metacarpals

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24
Q

Insertion of adductor pollicis?

A

Base of proximal phalanx of thumb

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25
Q

Function of adductor pollicis?

A

Adduction of CMC joint of thumb

Flexion of MCP joint of thumb

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26
Q

Innervation of adductor pollicis?

A

Deep ulnar nerve (C8, T1)

27
Q

What muscles make up the hypothenar eminence?

A

Abductor digit minimi
Flexor digiti minimi
Opponens digiti minimi

28
Q

Origin of abductor digiti minimi?

A

Pisiform

29
Q

Insertion of abductor digiti minimi?

A

Base of 5th proximal phalanx

Dorsal digital expansion

30
Q

Function of abductor digiti minimi?

A

Abduction and flexion MCP joint of little finger

31
Q

Innervation of abductor digiti minimi?

A

Deep ulnar nerve C8, T1

32
Q

Origin of flexor digiti minimi?

A

Hamate

Flexor retinaculum

33
Q

Insertion of flexor digiti minimi?

A

Base of 5th proximal phalanx

34
Q

Function of flexor digiti minimi?

A

Flex MCP joint of little finger

35
Q

Innervation of flexor digiti minimi?

A

Deep ulnar neve (C8, T1)

36
Q

Origin of opponens minimi?

A

Hamate

Flexor retinaculum

37
Q

Insertion of opponens minimi?

A

5th metacarpal

38
Q

Function of opponens minimi?

A

Weak opposition of little finger

39
Q

Innervation of opponens minimi?

A

Deep ulnar nerve C8, T1

40
Q

How many lumbricals are there?

A

4

41
Q

Which of the lumbricals are unipennate and which are bipennate?

A

1+2 = uni

3+4= bi

42
Q

From which structure do the lumbricals arise?

A

Tendons of flexor digitorum profundus

43
Q

Insertion of lumbricals?

A

Dorsal digital expansion

44
Q

Function of lumbricals?

A

MCP joint FLEXION

IP joint EXTENSION

(because they run anterior and posterior)

For digits 2 - 5

45
Q

Innervation of lumbricals?

A 
1+2 = digital branch of median nerve C8, T1
3+4 = deep ulnar nerve C8, T1
46
Q

Between which bones are the palmar interossei found?

A

Metacarpals

47
Q

How many palmar interossei are there?

A

3

48
Q

Origin of palmar interossei?

A

1st - 2nd MCP

2nd - 4th MCP

3rd - 5th MCP

49
Q

Insertion of palmar interossei?

A

All to dorsal expansion PLUS:

1st - 2nd proximal phalanx

2nd - 4th proximal phalanx

3rd - 5th proximal phalanx

50
Q

Function of palmar interossei?

A

Adduction towards middle finger (PAD)

51
Q

Innervation of palmar interossei?

A

Deep ulnar nerve C8, T1

52
Q

Origin of dorsal interossei?

A

From sides of 2 adjacent metacarpals

53
Q

Insertion of dorsal interossei?

A

To dorsal digital expansion PLUS

1st - 2nd proximal phalanx

2nd and 3rd - 3rd proximal phalanx

4th - 4th proximal phalanx

54
Q

How many dorsal interossi are there?

A

4

55
Q

Function of dorsal interossei?

A

Abduction (DAB)

56
Q

Innervation of dorsal interossei?

A

Deep ulnar nerve C8, T1

57
Q

Is there superficial palmar arch mostly from the radial or ulnar artery?

A

Ulnar

58
Q

Is the deep palmar arch mostly from the radial or ulnar artery?

A

Radial

59
Q

Which artery runs through the anatomical snuffbox?

A

Radial

60
Q

Name the 2 spaces and 1 tunnel within the hand

A

Palmar space
Thenar space
Lumbrical tunnel

61
Q

What dermatome is at the tip of the middle finger?

A

C7 (can work out rest using this)

62
Q

What is the general rule for innervation of the hand?

A

ALL ULNAR EXCEPT ‘LOAF’

Lumbricals (first two)
Opponens pollicis
Abductor pollicis brevis
Flexor pollicus brevis

63
Q

Is the radial nerve motor or sensory within the hand?

A

Sensory in hand (motor in posterior forearm)

Anatomy (49 decks)

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