- Demonstrate foot-drop during ambulation such that gait instability [need for supervision, physical assistance or assistive device (cane, walker) to maintain balance or prevent falls] or inefficient gait patterns [gait pattern manifesting "dragging" or "catching" of the affected toes during swing phase of gait, or use of compensatory strategies such as circumducting the affected limb, vaulting with the unaffected limb or hiking the affected hip to clear the toes] are exhibited