Gait 2 Flashcards
initial contact: GRF ankle
posterior
initial contact: GRF knee
anterior
initial contact: GRF hip
anterior
initial contact: ankle movement
neutral (0˚)
initial contact: knee movement
terminal extension (0)
initial contact: hip movement
flexed (~30˚)
initial contact: ankle muscles and action
- tibialis anterior (DF)
- concentric
initial contact: knee muscles and action
- quads
- concentric
initial contact: hip muscles and action
- hip extensors
- eccentric or isometric
Why is hip action eccentric?
- leg is finishing swing phase
- glutes control leg as it goes to initial contact
loading response: GRF ankle
slightly posterior
loading response: GRF knee
slightly posterior
loading response: GRF hip
slightly anterior, right through joint
loading response: ankle movement
plantarflexion (10-15˚)
loading response: knee movement
knee flexion (15˚)
loading response: hip movement
flexed, moving toward extension (~20˚)
loading response: ankle muscles and action
- anterior tib (DFs)
- eccentric
loading response: knee muscles and action
- quad
- eccentric
loading response: hip muscles and action
- hip extensors
- eccentric
What is happening overall during loading response?
- foot becomes flat
- transition weight forward (initial double limb support)
When weight is loaded into the leg, what happens to GRF?
goes into abdominal region
What happens if TA is not functioning properly?
foot slap
Why do the quads eccentrically contract in LR?
slow down movement
What would lead to excessive knee flexion/buckling?
- weak quads
- spastic hamstring
What force allows you to move into extension as you move forward?
momentum
