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PT 506 Kinesio / Biomechanics > Wrist Complex Biomechanics - 3 > Flashcards

Wrist Complex Biomechanics - 3 Flashcards

0
Q

close chained movement of humeroulnar like hands on table causes blank to move instead of blank

A

ulna, radius

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1
Q

degrees of freedom at humeroulnar joint

A

one (hinge)

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2
Q

capitate is the blank of the hand to keep it blank

A

keystone, supported/stable

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3
Q

central pillar effect in hand is due to what bone

A

capitate

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4
Q

carpals allow blank movements

A

flexion/extension, ulnar/radial deviation

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5
Q

aaos flexion value

A

80

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6
Q

aaos extension value

A

70

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7
Q

radial deviation aaos value

A

20

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8
Q

ulnar deviation aaos value

A

30

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9
Q

rc joint has a single blank surface that accomodates forearm and hand position

A

biconvex

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10
Q

this is in the proximal carpal row and is a sesamoid bone but is not included in the rc joint

A

pisiform

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11
Q

fcu blank is increased by pisiform

A

moment arm

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12
Q

rc joint contributes to blank and blank more than blank and blank

A

flexion/ulnar dev, extension/radial dev

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13
Q

no blank act directly on the blank joint

A

rc

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14
Q

ic joints are between all blank bones

A

carpal

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15
Q

ic joints allow minimal movement to accomodate blank and blank positioning

A

hand/wrist

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16
Q

ic joints are bound by blank and have little give

A

ligaments

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17
Q

ic ulnar side is more blank than radial

A

mobile

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18
Q

blank ligaments are stronger than blank ligaments at ic joints hence why we extend wrists extinctively when we fall

A

palmar, dorsal

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19
Q

most commonly dislocated carpal due to instability palmarly

A

lunate

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20
Q

ganglion cyst formation occurs at the proximal pole of the scaphoid because it has no blank

A

ligament attachment dorsally

21
Q

ligaments are blank movers

A

passive

22
Q

most stable ligaments because there are 3 rather than one like on the dorsal aspect of hand

A

volar radiocarpal ligament

23
Q

rc joint contributes more to blank than mc joint

A

flexion

24
Q

mc joint contributes more to blank than rc joint

A

extension

25
Q

rc joint is blank carpals moving on blank radius

A

convex, concave

26
Q

flexion of rc joint is a palmar roll and blank glide

A

dorsal

27
Q

extension of rc joint is a blank roll and palmar glide

A

dorsal

28
Q

radial dev of rc joint is blank roll and blank glide

A

radial, ulnar

29
Q

ulnar deviation is blank roll and blank glide

A

ulnar, radial

30
Q

with flexion, the blank flexes, the blank and blank extend…. this is called blank which increases ligament tension and stability

A

scaphoid, lunate/triquetrum, counter rotation,

31
Q

coming together of carpal articular surfaces increases blank

A

stability

32
Q

extension causes scaphoid to blank, while blank and blank flex

A

extend, lunate, triquetrum

33
Q

two halves of the blank joint

A

mc (midcarpal)

34
Q

2 halves of mc joint

A

radial, ulnar

35
Q

ulnar side of mc joint is blank hamate and capitate moving on blank lunate and triquetrum in frontal and sagittal planes

A

convex, concave

36
Q

radial side of mc joint is blank trapezoid and trapezium moving on blank scaphoid in frontal and sagittal planes

A

concave, convex

37
Q

blank deviation helps stability of rc and mc because they will be blank

A

radial, close packed

38
Q

ulnar side of mc and the whole rc are linked blank

A

anatomically/functionally (vex on cave)

39
Q

radial side of mc and the whole rc are linked blank

A

anatomically (cave on vex)

40
Q

secondary wrist action is from muscles that cause movement at blank primarily

A

digits

41
Q

origins/insertions pictures are well shown on the ppoint for lecture

A

ok

42
Q

ecrb attaches at the 3rd digit at the base so its only job is to blank

A

exten

43
Q

if ed was compensating for weak ecr, we would also get blank rather than just wrist extension

A

finger extension

44
Q

adm originates at blank

A

pisiform

45
Q

fcu contraction stabilizes blank to allow abduction of blank digit

A

pisiform, 5th

46
Q

adaptive shortening in a quadraplegic allows for better blank

A

function

47
Q

where adaptive shortening is good for function

A

tenodesis

48
Q

example of tenodesis function

A

grabbing a cup

49
Q

fcu and ecu allows pure ulnar deviation are blank

A

equal to each other

PT 506 Kinesio / Biomechanics (14 decks)

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