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Podiatric gait theory
How man walks
43
Medical
Professional
10/28/2008

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Term
what percentage is the swing phase of the gait cyle?
Definition
38-42 %
Term
What percentage is the stance phase/
Definition
51-62%
Term
How much does double support occupy gait cycle
Definition
8 to 12 %
Term
how is stance phase defined
Definition
heel contact to toe off
Term
what is stride length?
Definition
distance between 2 consecutive strike of same foot
Term
contact phase is how much of gait cycle/
Definition
10%
Term
midstance is what of gait cycle
Definition
opposite side toe off to heel lift of support foot
Term
how is active propulsion defined?
Definition
heel off of support to full strike of opposite limb...
Term
what is Cadence?
Definition
steps per minute
Term
step lenghth is what?
Definition
heel contact of one lift to heel contact of another
Term
what are approximate GRF at heel contact?
Definition
110 to 125%
Term
what is the position of the hip at contact?
Definition
flexed 30 degrees
Term
At contact the hip is experiencing a flexor force, which 2 muscles limit this motion...
Definition
gluteus maximum, adductor magnus
Term
at contact phase which muscle resist knee movement...
Definition
quads restrain flexion, and hamstrings resist hyperextension
Term
what position is the ankle at contact, and what motion occurs...
Definition
neutral, plantar flexes 8 degrees, which is resisted by pre-tibial muscles
Term
what position is the stj joint in at contact...which muscles achieve this?
Definition
Supinated 2-4 degrees, (ant tib)
Term
what position is the OA and LA at contact?
Definition
LA supinated (inv) (by ant tib and edl), OA is pronated (DF ABD) by pre-tibial muscles.
Term
are soleus and gastroc active in contact phase?
Definition
yes soleus decelerates internal tibial rotation, calcaneal eversion and forward tibial movement, gastroc produces mild flexion of knee.....
Term
at heel contact which intrinsics are active...
Definition
none
Term
which posterior extrinsics are active at heel contact
Definition
PT
Term
what does PT do in contact phase...
Definition
eccentrically contracts to slow STJ pronation, anterior, and internal rotation of tibia
Term
what are GRF at midstance?
Definition
about 75% because, center of gravity has risedn with knee extension
Term
discuss horizontal plane motion at hip..(midstance)
Definition
support limb is externally rotating, resulting in STJ suppination
Term
which muscles are causing the knee extension in midstance
Definition
quads
Term
describe ankle joint motion in midstance phase
Definition
ckc dorsiflexion
Term
excessive dorsiflexion is resisted in midstance by which muscle
Definition
soleus
Term
discuss movement of MTJ axis in midstance
Definition
LA goes from suppinated to pronated psoition, while OA remains pronated
Term
which pre-tibial muscles are active during midstance?
Definition
none, dummy
Term
which intrinsics are active in midstance and what do they do...
Definition
EDB stablizes central 3 mets, lumbricals stabilize toes
Term
which post extrinsics are active in midstance
Definition
PT, PL, PB, FDL FHL
Term
explain how PL and PT are creating stability at the MTJ by their activity in midstance
Definition
PT is suppinating OA, PL is proanting. also grf is maintain OA in pronation so this act antagonistically to stablize tarsels
Term
DIET TIP:
Definition
Lose weight quickly by eating raw pork or rancid tuna. The subsequent food poisoning/diarrhea will enable you to lose 5-10 kgs in only 2 days
Term
you know its exam time when..?
Definition
you drink more coffee than water
Term
describe stj motion in active propulsion
Definition
rapid suuppination, with calcaneal adduction
Term
whatre are the phases of stance phase?
Definition
contact, midstance, active propulsion, passive lift-off
Term
discuss movement of MTj OA and LA in active propulsion..
Definition
LA pronates, OA supination (add and plantarflexion)
Term
discuss activity of pretibial muscles in active propulsion...
Definition
inactive
Term
describe passive lift-off
Definition
begins oppsoite heel contact and ends with support toe-off
Term
discuss hip motion at passive liftoff
Definition
hip extension is reversed, and undergoes rapid flexion to a neutral position
Term
what happens to knee at passive lift off
Definition
knee undergoes rapid flexion reaching 40 degrees at toe-off
Term
discribe exact degree motion of ankle at passive liftoff
Definition
DF 5-7 dgrees to plantarflexed 20 degrees
Term
which muscles are primarily functioning in passive lift off
Definition
intrinsics, which along with long extensors and flexors maintain digit stability
Term
discus GRF in swing phase
Definition
there is none smelly
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