Effects of real-time visual feedback in the form of a virtual avatar on symmetry and other parameters of gait post stroke

Gait asymmetry, one of the hallmarks of post stroke locomotion, often persists despite gait rehabilitation interventions, impacting negatively on functional mobility. This pilot study examines the feasibility and instantaneous effects of real time visual feedback provided in the form of an avatar on gait symmetry. Preliminary results obtained from seven chronic stroke survivors showed no improvements in step length and step time ratios while using three avatar views (back, frontal and paretic side). Improvements in lower limb joint angle symmetry, however, were observed. Faster walking speed and larger paretic step length were also noted during the adaptation and post-adaptation phases. We are currently extending the study to a larger sample to validate the use of real time visual feedback to enhance spatial parameters of gait among stroke survivors.