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Prosthetics - Midterm > Biomechanics 2 - TF > Flashcards

Biomechanics 2 - TF Flashcards

1
Q

whatre we concerned about –> M/L alignment

A

stabilizing RL in the socket

stabilizing hip joint/pelvis in frontal plane

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2
Q

M/L stability

A

single leg stance

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3
Q

gait

A

midstance

stabalization

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4
Q

stabilization –> gait

A

socket/RL interface

muscle stabilization

pelvis falls to unsupported side

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5
Q

socket/RL interface –> stabilization

A

prevent movement b/w them

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6
Q

pelvis falls to unsupported side –> stabilization

A

eccentric ABDs

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7
Q

M/L normal BoS

A

2-4”

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8
Q

support point –> ML

A

weight bearing point

ischial containment

G max/ischial tub

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9
Q

support line –> ML

A

weight line

from support point to ground

inset/neutral/outset

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10
Q

inset foot –> ML

A

normal ML alignment

normal BoS

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11
Q

what should we look at –> ML alignment

A

pressures in socket

stabilization of ABD (pelvis)

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12
Q

socket pressures –> inset

A

proximal medial

distal lateral (cut end of femur)

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13
Q

socket pressures –> outlet

A

distal medial (ADDs)

proximal lateral (greater trochanter, pressure sensitive)

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14
Q

ABD stabilization –> MS

A

lateral socket stabilizes ABDs

prevents pelvis from dropping on unsupported side

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15
Q

ischial containment socket –> socket design

A

pressure system/pelvic lock

3 point pressure system

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16
Q

what does the ischial containment socket prevent

A

shifting of tibial tuberosity

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17
Q

what does the ischial containment socket stabilize

A

the pelvis

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18
Q

ischial containment socket has

A

narrow M/L

curve of lateral femur

pelvic lock

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19
Q

pelvic lock –> ischial containment socket

A

ischial tuberosity locked

minimizes movement

minimize socket pressure

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20
Q

minimize socket pressure –> ischial containment

A

minimize distal lateral pressure

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21
Q

foot alignment –> ML

A

b/c femur is well stabilized

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22
Q

what is the femur well stabilized w/ –> foot alignment

A

start at inset

move out laterally if there is lateral pain

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23
Q

ABD stabilization has

A

narrow ML

curve of lateral socket along the shape of femur

pelvic lock

stabilizes ABDs

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24
Q

socket position –> ABD stabilization

A

neutral

not adducted

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25
Q

subischial socket has no

A

lock of ischial tuberosity

ischial tuberosity slides w/ muscle contraction

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26
Q

subischial socket provides

A

poor stabilization of the ABDs

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27
Q

w/ a subischial socket

A

get gait deviation

lateral trunk bend

28
Q

ABD stabilization result –> socket position

A

in ADD

puts ABDs on stretch

29
Q

ischial containment –> foot position

A

start at inset

30
Q

ischial containment –> socket position

A

neutral b/w ABD and ADD

31
Q

subischial –> socket position

A

socket position

32
Q

AP stabilization

A

socket position

knee/TKA line

33
Q

what muscle is most important at HS –> AP stabilization –> ischial containment socket

A

G max

34
Q

what does the socket wall do–> AP stabilization –> ischial containment socket

A

stabilizes distal attachment

lock on the pelvis

good G max stabilization

35
Q

socket position –> AP stabilization –> ischial containment socket

A

neutral

36
Q

subischial socket –> AP

A

poor stabilization of the G max

put G max on stretch

AP socket position is flexed

37
Q

knee alignment/TKA line is

A

independent of socket type

38
Q

TKA line

A

trochanter/knee/ankle

39
Q

for AP alignment we look at

A

knee in relation to TKA line

40
Q

alignment terms

A

involuntary alignment

voluntary alignment

neutral alignment

41
Q

involuntary alignment

A

pt doesnt work to knee stable

aligned for stability

42
Q

voluntary alignment

A

pt has to work to keep knee stable

aligned for mobility

43
Q

neutral alignment

A

balanced b/w involuntary and voluntary

balanced b/w stability and mobility

44
Q

knee position

A

in relation to TKA line

45
Q

anterior to TKA –> knee position

A

flexion moment

46
Q

posterior to TKA –> knee position

A

extension moment

47
Q

in line w/ TKA –> knee position

A

balance b/w

48
Q

involuntary alignment –> knee and TKA

A

knee posterior to TKA

49
Q

flexing the knee –> involuntary

A

harder to do

50
Q

involuntary alignment is

A

more stable

less mobile

51
Q

how is involuntary alignment controlled

A

by alignment

52
Q

voluntary alignment –> knee/TKA

A

knee is anterior to TKA

53
Q

flexing the knee –> voluntary

A

easier

54
Q

voluntary alignment is

A

less stable

more mobile

55
Q

voluntary alignment –> control

A

pt controlled

56
Q

neutral –> TKA/knee

A

knee in line w/ TKA

57
Q

neutral alignment is

A

balanced

58
Q

there is a balance b/w –> neutral

A

mobility and stability

59
Q

neutral control

A

some alignment control

some pt control

60
Q

what should we always consider

A

alignment

fxnal level of pt

61
Q

characteristics of the components

A

any control from component

friction, computerized, hydraulic

62
Q

more aggressive alignment

A

voluntary

63
Q

less aggressive alignment

A

involuntary

64
Q

AP alignment –> ischial containment –> socket position

A

neutral

65
Q

AP alignment –> ischial containment –> knee/TKA position

A

pt and component dependent

66
Q

AP alignment –> subischial containment –> socket position

A

flexed

67
Q

AP alignment –> subischial containment –> knee/TKA position

A

pt and component dependent

Prosthetics - Midterm (8 decks)

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