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BU Anatomy > Hand > Flashcards

Hand Flashcards

1
Q

Name the (2) types of prehension.

A

Manipulative and Non-manipulative prehension

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2
Q

Which type of prehension is more concerned with fine motor skills?

A

Manipulative prehension - tip-to-tip grip, lateral pinch or palmar pinch

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3
Q

The carpal bones articulate with which bones?

A

The radius and then the metacarpals distal to them

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4
Q

How many phalanges in total?

A

14 phalanges

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5
Q

Describe a boxer’s fracture?

A

Fracture of the 5th metacarpal

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6
Q

What types of articulations occur at Carpometacarpal joints (CMC)?

A

Digits 2-5: Gliding

Thumb: Saddle

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7
Q

What articulations occur at MCP/MP joints?

A

Digits 2-5: Condyloid

Thumb: Hinge

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8
Q

The DIP, PIP and IP joint of the thumb are all?

A

Hinge Joints

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9
Q

Flexion/Extension of Digits 2-5 can occur at which all joints?

A

DIP, PIP and MCP/MP

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10
Q

ABduction/ADduction of digits 2-5 occur at which joints of the hand?

A

MCP/MP joints of hand

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11
Q

ABduction/ADduction of the thumb occurs at which joint?

A

CMC joint

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12
Q

Flexion/Extension of thumb occurs at which joint?

A

CMC, MCP and IP joints

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13
Q

Opposition of thumb occurs at which joints?

A

CMC joint

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14
Q

What do the collateral ligaments guard against>

A

Excessive lateral deviation of the MCP and IP joints

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15
Q

What do the volar (palmar) ligaments (plates) guard against?

A

Hyperextension of the joint and aids in centering the long flexor tendons

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16
Q

Where do extrinsic hand muscles have their proximal attachments?

A

Outside of the hand out in the forearm

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17
Q

Which type of prehension are extrinsic hand muscle responsible for?

A

Non-manipulative prehension

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18
Q

Intrinsic hand muscles begin and end where?

A

The hand

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19
Q

Proximal attachment of FDS?

A

Medial epicondyle of humerus (like other wrist flexors)

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20
Q

Distal attachment of FDS?

A

Base of middle phalanx of digits 2-5

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21
Q

Action of FDS?

A

Flexion of digits 2-5 at the PIP joint

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22
Q

Innervation of FDS?

A

Median nerve

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23
Q

Proximal attachments of FDP?

A

Proximal ulna and Interosseous Membrane

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24
Q

Distal attachments of FDP?

A

Base of distal phalanx of digits 2-5

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25
Q

Action of FDP?

A

Flexion of digits 2-5 at the DIP joints

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26
Q

Innervation(s) of FDP?

A

Medial 1/2 - ulnar n.

Lateral 1/2 - Anterior interosseous nerve

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27
Q

Proximal attachment of ED?

A

Lateral epicondyle of humerus

28
Q

Distal attachment of ED?

A

Extensor expansion

29
Q

Action of ED?

A 
Extension of digits 2-5
at MCP (also IP)
30
Q

Innervation of ED?

A

Posterior interosseous nerve (branch of Radial nerve)

31
Q

Name (2) other extrinsic digit extensors in addition to ED?

A

Extensor indicis proprius

Extensor digiti minimi

32
Q

Innervations of EIP and EDM?

A

Posterior interosseous nerve

33
Q

What structure couples the actions of digits 2-5?

A

Juncturae Tendinum - lateral connections between ED tendons

34
Q

Which structure is responsible for ED’s actions on IP joints?

A

The extensor expansion

35
Q

Proximal attachment of FPL?

A

Anterior radius

36
Q

Distal attachment of FPL?

A

Distal phalanx of thumb

37
Q

Action of FPL?

A

Flexes IP of thumb

38
Q

Innervation of FPL?

A

Anterior interosseous nerve

39
Q

Proximal attachment of EPL?

A

Post. distal ulna

40
Q

Distal attachment of EPL?

A

base of distal phalanx of thumb

41
Q

Action of EPL?

A

Extends the IP of thumb

42
Q

Innervation of EPL?

A

Posterior interosseous nerve

43
Q

Attachments of EPB?

A

Post. distal radius –> base of proximal phalanx of thumb

44
Q

Actions of EPB?

A

Extends CMC and MCP joints

45
Q

Innervation of EPB?

A

Posterior interosseous nerve.

46
Q

Action of ABductor Pollicis Longus?

A

Abducts thumb at CMC joint

47
Q

Innervation of ABductor Pollicis Longus?

A

Posterior Interosseous Nerve

48
Q

De Quervain’s Tenosynovitis

A

Inflammation of EPB and APL tendons as they glide over radial styloid process

49
Q

Describe Finklestein’s Test?

A

Hold thumb and perform ulnar deviation of wrist: if pain present then positive for De Quervain’s Tenosynovitis

50
Q

Name the muscles included in the thenar musculature?

A

Opponens pollicis
Flexor Pollicis Brevis
Abductor Pollicis Brevis

51
Q

Innervation of Opponens pollicis?

A

Recurrent branch of median nerve

52
Q

Innervation of Flexor pollicis brevis?

A

Recurrent branch of median and ulnar.

53
Q

Innervation of Abductor pollicis brevis?

A

Recurrent branch of median n.

54
Q

Name the muscles included in the hypothenar musculature?

A

Abductor digiti minimi
Flexor digiti minimi brevis
Opponens digiti minimi

55
Q

Carpal tunnel syndrome is identifiable because?

A

Thenar wasting and parasthesias

56
Q

Adductor pollicis action?

A

Adducts thumb at CMC joint

57
Q

Adductor pollicis innervation?

A

Ulnar Nerve

58
Q

Lumbricals are special because?

A

Only muscle to not have any bony attachments

FDP tendons -> Extensor hood

59
Q

Action of lumbricals?

A

Flex at MP joint but extend DIP/PIP joints

60
Q

Innervation of Lumbricals?

A

Lumbricals 1/2 - median

Lumbricals 3/4 - Ulnar N.

61
Q

Dorsal Interossei

A

DAB - do ABduction and Ulnar N. innervation

62
Q

Palmar Interossei

A

PAD - do ADduction and Ulnar N. innervation

63
Q

Swan Neck Deformity

A

Volar plates are lax so the PIP joints hyperextend and DIP joints flex

64
Q

Boutonniere Deformit

A

PIP joint protrudes through central tendon; PIP flexion with DIP extension

65
Q

Mallet Deformity

A

inability to extend the DIP

66
Q

Tenodesis

A

phenomenon where extension of the wrist increases distance over which flexors of fingers act

BU Anatomy (15 decks)

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