Evaluation of Sensorimotor Ankle Impairments in Chronic Stroke

Inclusion criteria * 40 - 80 years of age, inclusive * Normal hearing and vision, can be corrected * No skin allergies to adhesive material, conductive paste, or silver * Ability to walk \>10m independently on level ground without an assistive device or bracing * Able to understand and give informed consent * Able to understand and speak English Inclusion criteria specific for healthy participants: * No neurological disorders * Absence of pathology that could cause abnormal movements of extremities (e.g., epilepsy, stroke, marked arthritis, chronic pain, musculoskeletal injuries) Inclusion criteria specific for participants post-stroke: * Unilateral, supratentorial ischemic or hemorrhagic stroke ≥ six months prior * Minimum activation against gravity for dorsiflexion and plantarflexion, equivalent to a Manual Muscle Test (MMT) score of ≥ +2 * Self-selected walking speed is less than 1.2 m/s Exclusion criteria * Cognitive limitations that would prevent playing games * Adults unable to consent, pregnant women, children, or prisoners * Infection, wounds, or graft sites on lower limbs * History of sustained non-prescribed drug use or substance abuse (as reported by subject; current nicotine use is allowed) * History of peripheral nerve injury * Severe hip, knee, or ankle arthritis * Recent fracture or osteoporosis (as reported by subject) * Bone or joint instability in the lower limb * Severe pain syndromes affecting any part of the lower limbs * Fixed contractures affecti…