Intro To Orthotics (2) Flashcards by Victoria Caridi

Q

ground rxn force =

A

gravitational force + frictional force

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Q

GRF is the

A

resultant of 2 forces

gravitational = vertical

frictional force = horizontal force

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Q

GRF varies w/

A

the position of the foot/body on the ground

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Q

GRF at initial contact

A

ankle: posterior

knee: posterior

hip: anterior

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Q

GRF flat foot/loading response

A

ankle: posterior

knee: posterior

hip: anterior

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Q

GRF midstance

A

ankle: anterior

knee: neutral/anterior

hip: neutral/posterior

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Q

GRF terminal stance/heel off

A

ankle: anterior

knee: anterior

hip: posterior

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Q

GRF preswing/toe off

A

ankle: anterior

knee: posterior

hip: posterior

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Q

what is needed for fxnal gait

A

control of foot, ankle hip & knee

foot must be prepositioned right before heel strike

support of the BW during stance phase

foot clearance during swing phase

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Q

foot clearance during swing phase

A

strong ankle and knee on WB side

strong hip on swinging side

stroke ankle of swinging side

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Q

what must be addressed for those w/ DF weakness

A

prepositioning for heel strike

prevention of foot slap at heel strike

swing clearance

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Q

what must be addressed for those w/ PF weakness

A

drop - off at the end of midstance

decreased push off

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Q

drop - off at the end of midstance

A

late mid-stance the GRF anterior to ankle

loss of eccentric gastroc/soleus muscle controls ankle

decrease stance phase/early lift off

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Q

decreased push off

A

DFs lift foot off ground

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Q

other considerations

A

balance

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Q

balance –> ankle/foot

A

core consideration in management of pt w/ AFO

Q

in the best case what will an AFO do

A

compensate for balance deficit

Q

how will an AFO compensate for balance deficits

A

reduce fall risks

improve confidence

facilitate greater activity and participation

Q

AFOs have the potential to

A

compromise balance and do the opposite

Q

contraindications for orthotics

A

open wound in contract w/ orthosis

decreases in fxn

Q

what is the most dangerous point in gait

A

initial contact

Q

terminal stance is a period of

A

double support

Q

most energy consuming part of gait

A

terminal stance/ heel off

Q

swing phase of gait is a

A

dynamic phase of gait

keep the momentum going

Q

ankle GRF

A

posterior = PF

anterior = DF

Q

knee GRF

A

posterior = flexion

anterior = extension

Q

hip GRF

A

posterior = extension

anterior = flexion