Gait: the role of the ankle and foot in walking.

Evaluation of gait and its associated deviations from normal requires an in-depth evaluation of the patient and an appreciation for the complexity of the task. Understanding gait starts with an appreciation of the basic determinants of gait. Foot drop is a common gait deviation. Functionally, a foot drop results in a long limb. This will result in alterations of the gait cycle during swing phase. The common compensations for a foot drop include steppage gait, circumduction, and a persistently abducted limb. Noninterventional options for management of common gait deviations secondary to ankle/foot dysfunction present challenges.