Prosthetic Gait Flashcards
Where does COM move after amputation?
-Towards heavier part of body.
-Away from amputated limb.
-LE amputation = also shifts upward/superior.
-UE amputation = shifts lower.
How does the socket wall mimic muscle-related deviations?
-Socket wall becomes the “new muscle” (anterior wall = functions like quads).
-Low socket wall = weak muscles.
-High socket wall = tight muscles.
Example: lateral trunk lean d/t weak hip ABD or d/t low lateral wall.
What may cause foot rotation during IC?
-Stiff heel cushion.
-Incorrectly rotated foot.
What may cause lateral trunk lean during stance?
-Short prosthesis.
-Low lateral wall.
What may cause excessive abduction during stance?
-Long prosthesis.
-Abducted hip joint.
What may cause lordosis during stance?
Anterior wall discomfort
What may cause forward flexion during stance?
-Unstable knee joint.
-Short walker.
What may cause heel whip during heel-off?
-Knee bolt rotated.
-Prosthesis donned in poor rotation.
Medial heel whip indicates the knee bolt is…
ER
Lateral heel whip indicates the knee bolt is…
IR
What may cause high heel rise during early swing?
-Inadequate friction
-Slack extension aid (knee flexes too much)
What may cause terminal impact during late swing?
-Inadequate friction
-Taut extension aid (uncontrolled whip into max extension)
If Heel/PF Bumper is too stiff/hard…
-PF is restricted, less absorption of heel strike.
Compensations:
-Abrupt or excessive knee flex.
-Excessive DF.
If Heel/PF Bumper is too soft…
-GRF moves too far anteriorly from IC to mid-stance.
Compensations:
-Knee hyperext.
-Excessive PF.
Orthotics: inadequate DF assist mimics…
Weak DF
