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clin kines 2 > wrist > Flashcards

wrist Flashcards

1
Q

What are the 2 articulations of the wrist?

A

Radiocarpal
Midcarpal joints

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2
Q

T/F: wrist actions = flex/ext, radial/ulnar deviation, active rotation

A

F: NO active rotation

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3
Q

T/F: ulnar= lat side

A

F: medial
(radial/thumb= lat)

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4
Q

T/F: distal articular surface of radius= concave M/L and A/P

A

T

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5
Q

T/F: radiocarpal joint = betw distal end of radius and prox row of carpal bones

A

T

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6
Q

Midcarpal joint joins __ and ___

A

Prox and dis rows of carpal bones

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7
Q

What mvt do the radiocarpal and mid carpal joint do

A

Radial and ulnar deviation

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8
Q

Palmar and volar = ___, dorsal =___

A

Ant
Post

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9
Q

Dorsal (Lister’s) tubercle separates what 2 tendons

A

Extensor carpi radialis brevis
Extensor pollicis longus

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10
Q

T/F: ulnar tilt allows hand to rotate further into ulnar deviation than radial

A

T

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11
Q

How many degrees of ulnar tilt?

A

25 deg

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12
Q

Palmar tilt allows for greater mvt of __ than __ @ wrist

A

Flexion
Extension

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13
Q

How many degrees of palmar tilt?

A

10 deg

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14
Q

T/F: ulnar tilt limits radial dev, palar tilt limits ext

A

T

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15
Q

Carpal bones

A

Scaphoid
Lunate
Triquetrum
Pisiform
Trapezium
Trapezoid
Capitate
Hamate

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16
Q

Carpal bone mnemonic

A

Some Lovers Try Positions
That They Can’t Handle

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17
Q

What carpal bones make up the prox row

A

Scaphoid
Lunate
Triquetrum
Pisiform

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18
Q

What carpal bones make up the dis row

A

Trapezium
Trapezoid
Capitate
Hamate

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19
Q

T/F: proximal row= mobile, distal row= stable

A

T

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20
Q

Scaphoid pole: prox=___, distal=___

A

Scaphoid facet (radius)
Trapezium and trapezoid

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21
Q

T/F: triquetrum = central bone of prox row and is unstable/most mobile (no musc attachments)

A

F: lunate

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22
Q

T/F: scaphoid and triquetrum are avascularized

A

F: scaphoid and lunate

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23
Q

Proximal surface of lunate= ___, distal=___

A

Convex (similar to scaphoid)
Concave

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24
Q

What 3 carpal bones are fractured most (rank)

A
  1. scaphoid
  2. lunate
  3. triquetrum
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25
Q

T/F: scaphoid= most frequently dislocated

A

F: lunate

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26
Q

T/F: trapezoid = largest carpal bone

A

F: capitate

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27
Q

T/F: capitate head = AoR for all wrist mvt

A

T

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28
Q

Head capitate articulates w/ __&__
Distal attachment = ___

A

Scaphoid and lunate
3rd metacarpal

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29
Q

Trapezium attaches to which metacarpal?

A

1st

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30
Q

Palmar side of carpal bones =___

A

Concave

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31
Q

T/F: trapezium= saddle shaped

A

T

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32
Q

T/F: groove on trapezium for flexor carpi ulnaris

A

F: flexor carpi radialis

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33
Q

Trapezoid attaches to which metacarpal?

A

2nd

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34
Q

Hamate attaches to which metacarpal?

A

4 and 5

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35
Q

___ = attachment point for medial side of transverse carpal lig. Lat side?

A

Hook of hamate
Trapezium

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36
Q

Contents of carpal tunnel (under transverse carpal lig)

A

Flexor digitorum superficialis
Flexor digitorum profundus
Flexor pollicis longus
Median n

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37
Q

Transverse carpal lig connects to 4 points

A

Radial: scaphoid and trapezium tubercles

Ulnar: pisiform and hook of hamate

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38
Q

T/F: inter carpal joints allow sm glides and rotations that contribute to overall ROM

A

T

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39
Q

Radiocarpal joint: concave ___, convex ___

A

Radius
Prox row carpal bones

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40
Q

Prox components of radiocarpal = ___ surface of radius and adjacent articular disc

Distal components of radoiocarpal = ___ surface of scaphoid and lunate

A

Concave

Convex proximal

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41
Q

20% compression forces that cross radoiocarpal joint passes through ___. What about remaining 80%?

A

Articular disc to ulna

Through scaphoid and lunate -> radius

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42
Q

T/F: radiocarpal joint contact area= greatest when wrist is partially extended and slightly deviated in radial direction

A

F: ulnar deviation

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43
Q

What is the pos of max grip strength?

A

Wrist partially extended, ulnar deviated

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44
Q

Proximal surface of prox row = ___ surface of radiocarpal joint?

A

Distal

(A-P and M-L convex)

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45
Q

Midcarpal joint = 2 compartments

A

Med and lat

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46
Q

Med compartment of mid carpal joint = formed by

A

Convex head of capitate and apex of hamate into concave recess (formed by distal surfaces of scaphoid, lunate and triquetrum)

(like ball in socket)

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47
Q

Lat compartment of mid carpal joint = formed by

A

Convex distal pole of scaphoid w/ slightly concave prox surface of trapezium and trapezoid

48
Q

T/F: med compartment of mid carpal joint =less moveable

A

F: most mobile
(lat= less mvt)

49
Q

T/F: wrist mvt = lat compartment of mid carpal

A

F: med

50
Q

T/F: wrist lig help maintain natural intercarpal alignment and transfer forces w/in and across carpus

A

T

51
Q

T/F: wrist lig= extrinsic/intrinsic

A

T

52
Q

Extrinsic lig vs intrinsic lig

A

E: prox attachment on radius/ulna, attach distally w/in wrist

I: both prox and distal attachments w/in wrist

53
Q

The dorsal radiocarpal ligament attaches primarily between ?

A

Distal radius and dorsal surfaces of lunate and triquetrum

54
Q

Dorsal radiocarpal lig reinforces ___ side of radiocarpal joint and guides natural arthrokinematics of prox row

A

Post

55
Q

Dorsal radiocarpal lig attaches to lunate restrains __ disloc

A

Ant (volar)

56
Q

T/F; radial collateral lig provides med stability to wrist

A

F: lat

57
Q

Dorsal radiocarpal ligament has a relatively dominant role in wrist proprioception, why?

A

Large number of mechanoreceptors

58
Q

T/F: dorsal radiocarpal ligament provides greater overall mechanical stability to the wrist

A

F: Palmar radial carpal ligament

59
Q

TFCC allows what wrist mvt?

A

Pron/sup

60
Q

What is the primary component of the TFCC?

A

Triangular fibrocartilage (articulate disc)

61
Q

The triangular fibrocartilage attaches @ base along ___, apex=___

A

Ulnar notch of the radius
Fovea on the distal surface of ulna

62
Q

Central ___ of TFC is avascular

A

80%

63
Q

The articular disc of TFCC = from ___ to ___

A

Ulnar notch (radius)
Styloid process (ulna)

64
Q

T/F: ulnar collateral lig is tensioned in radial dev

A

T

65
Q

Palmar ulnocarpal lig= important___

A

Stabilizer (for lunate)

66
Q

What are the 3 classifications for intrinsic ligaments of the wrist?

A

Short
Intermediate
Long

67
Q

Short intrinsic ligaments connect ___ row by palmar, dorsal or interosseous surface

A

Distal
(stabilize, and unite distal row)

68
Q

Scapholunate ligament attaches to which carpal bone

A

Scaphoid

69
Q

T/F: scapholunate lig= ruptured w/ foolish injury

A

T

70
Q

Palmar intercarpal ligament, =2 discrete fiber groups that resemble shape of an inverted V

A

Lateral leg (attaches to scaphoid)
Media leg (triquetrum)

71
Q

What do dorsal intercarpal ligament and dorsal radiocarpal ligament have in common?

A

Large number of mechanoreceptors (important sensory roll and coordinating wrist movement)

72
Q

Axis of rotation for wrist movement occurs through the head of which carpal bone

A

Capitate

73
Q

Axis for flexion and extension =___, radial and ulnar deviation=___

A

M-L
A-P

74
Q

Flexion = assoc w/ ___, ext =___

A

Ulnar dev
Radial dev

75
Q

The wrist rotates in the sagittal plane about ___ degrees

A

130-160

76
Q

The wrist flexors from ___ degrees to ___ degrees, extends from ___degrees to ___degrees

A

0-70 or 85
0-60 or 75

77
Q

Motion of selection at the wrist normally exceeds extension by about ___ degrees

A

10-15

78
Q

What limits and range extension

A

Stiff and thick palmar radiocarpal ligaments

79
Q

First rotates in the frontal plane approximately ___ degrees

A

50-60

80
Q

Ulnar deviation occurs from ___ degrees to ___ degrees

A

0 to 35-40

81
Q

Radial deviation occurs from ___ degrees to ___ degrees

A

0 to 15-20

82
Q

ADLs can be comfortably performed using ___ degrees of flexion, ___ degrees of extension, ___ degrees of radial deviation, ___ degrees of ulnar deviation

A

40
40
10
30

83
Q

Extension naturally occurs with ___ deviation, flexion with ___ deviation

A

Radial
Ulnar

84
Q

T/F: the rest is a single joint system

A

F: double joint system

(movement occurring simultaneously at radiocarpal and midcarpal joint)

85
Q

Central column is made up of what 4 parts?

A

Distal radius
Lunate
Capitate
3rd metacarpal

86
Q

W/in central column, radoiocarpal joint = articulations betw ___, medial compartment: mid carpal joint= articulations betw ___, carpometacarpal joint?

A

Radius and lunate
Lunate and capitate
Capitate and base 3rd metacarpal

87
Q

Extension occurs as ___ surface of lunate rolls ___ on the radius, and simultaneously slides in a ___ direction

A

Convex
Dorsally
Palmar

88
Q

Full wrist ext, elongates ___ radiocarpal lig and all musc cross same side of wrist

A

Palmar

89
Q

T/F: scaphoid on radius during flexion of central column follows same direction as lunate, but has a diff speed

A

T

90
Q

T/F: during ulnar dev, radoiocarpal joint= contribute to overall wrist mvt

A

F: midcarpal

91
Q

About __% of radial dev across wrist occurs @ midcarpal

A

85

92
Q

Prox row ___ during radial dev, ___ during ulnar dev

A

Flex
Ext

93
Q

Primary cause of carpal instability=

A

Laxity, rupture of lig

94
Q

Carpal instability= ___ force tilts lunate (slides down on incline) –> zigzag deformity

A

Compression

95
Q

T/F: prox row = susceptible to rotational collapse in zigzag

A

T

96
Q

Ulnar translocation of carpus occurs bc

A

Radius = slanted

97
Q

___ n innervates all musc cross dorsal side of wrist

A

Radial

98
Q

___ n innervates all musc cross palmar side of wrist

A

Median and ulnar

99
Q

Radiocarpal and mid carpal joint sensory innervation = _____ n root (in median and radial n)

A

C6 and C7

100
Q

Midcarpal joint= also innervated by sensory n traveling to ___ spinal n root via deep branch of ulnar n

A

C8

101
Q

T/F: some musc of wrist has line of force that passes precisely through either M-L and A-P AoR

A

F: NONE

(combination of mvts)

102
Q

T/F: wrist extensors attach on lat epicondyle

A

T

103
Q

ECRL= attaches to__ digit, ECRB? ECU?

A

L: 2
B: 3
U: 5

104
Q

Tendons cross dorsal and dorsal-radial side of wrist = secured in place by ____

A

Extensor retinaculum

105
Q

Extensor retinaculum prevents

A

Underlying tendons from bowstringing up and away fr radiocarpal joint during active mvts of wrist

106
Q

Betw extensor retinaculum and underlying bones= 6 fibro-osseus compartments that house tendons along synovial sheath. How are these compartments referred?

A

Roman numerals I-VI

107
Q

Each fibro-osseus compartment houses specific ___

A

Set of tendons

108
Q

de Quervain’s tenosynovitis affects which fibro-osseus compartment?

A

I

109
Q

What is the main func of wrist extensors?

A

Pos and stabilize wrist during activities involving active flexion of digits

110
Q

T/F: injury to median n –> dec grip

A

F: radial n

111
Q

Strong, static grip, wrist extensors hold wrist about ___ deg of ext, ___ deg ulnar dev

A

30-35
5-15

112
Q

T/F: grip strength= reduced when wrist= fully flexed

A

T

113
Q

Lat epicondylitis affects ___ 1st, then ___

A

ECRB
ECRL

114
Q

T/F: repetitive forceful grip in flexion direction –> lateral epicondylitis

A

F: extension

115
Q

T/F: flexors>extensors total torque @ wrist

A

T

116
Q

ABD pollicis longus and extensor pollicis breves provide stability for ___ side wrist

A

Radial

117
Q

T/F: ulnar dev>radial dev @ wrist

A

F: radial>ulnar

clin kines 2 (6 decks)

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