Foot Slap
Rapid, uncosmetic PF movement at heel contact. Most commonly caused by insufficient PF resistance.
Knee Instability
Uncontrollable knee flx at LR. May be caused by anteriorly placed knee unit, excessive durometer of cushion heel or PF bumper, or weakness of hip extensors.
Abducted gait
Wide walking base throughout the gait cycle, often caused by pressure or discomfort on medial pubic ramus, small socket, or excessively long prosthesis.
Pelvic Elevation
“Hip hiking” on prosthetic side from ISw to MSw, associated with increased energy cost of gait. Often caused by long prosthesis or inadequate knee flx as swing begins.
Lateral Whip
The heel of the prosthetic foot moves in a lateral arc as swing begins. Often caused by excessive IR of the knee bolt.
Medial Whip
The heel of the prosthetic foot moves in a medial arch as swing begins. Often from excessive ER of the knee bolt or improper donning of prosthesis.
Circumduction
A wide lateral arch of the prosthetic limb during swing phase. Often the result of inadequate knee flx, excessive medial brim pressure, or long prosthesis.
Vaulting
Vaulting Rising up on the sound forefoot during MSt in an effort to enhance prosthetic swing limb clearance. May result from a long prosthesis, excessive knee friction, or fear of letting the knee flex.