The study will explore the use of a haptic device for sensory substitution in individuals with a movement disorder that has caused loss of plantar sensation. The haptic device consists of two components. The first element is a flexible insole with embedded pressure-sensing elements that transmit the spatial patterns of applied foot pressure over time. The second element is a haptic receiver with embedded actuators that vibrate or heat up in proportion to the transmitted pressure patterns, thus substituting the patient's lost plantar sensation.

OBJECTIVES:

1. Identify a systematic, methodical approach to determine whether different users of our haptic device can perceive and use vibrational and thermal feedback in order to correct their posture in real-time.
2. Evaluate whether a haptic device can be used to guide users to maintain a prescribed pattern of pressure on their feet during standing and walking.
3. Investigate whether a haptic device can improve outcomes on motor evaluation tasks.

Inclusion Criteria:

• Able to ambulate 10 meters with or without assistance
• Able and willing to give written consent and comply with study procedures

Exclusion Criteria:

• Unable to give written consent or comply with study procedures
• Unable to perceive unsafe levels of heat in relevant areas
• Has a motor complete spinal cord injury
• Have transfemoral (above knee) amputation
• Any condition that would prevent the safe completion of study activities, as determined by the Principal Investigator