Functional Performance of Voluntary Opening and Closing Body Powered Prostheses

To evaluate the performance of the prehensors, subjects will complete a randomized A-B crossover study with a subjective follow-up. Two subject categories will be evaluated: 1.) healthy non-amputees, and 2.) unilateral transradial amputee subjects who currently use, or are interested in using a body-powered prosthesis. We anticipate data collection data with 10 non-amputee subject, and 8 amputee subjects.

Inclusion criteria

• Unilateral transradial or wrist-disarticulation amputee
• 18 to 85 years of age
• At least 1 year from date of amputation
• Be able to independently provide informed consent
• Be willing to comply with study procedures Exclusion criteria
• History of acute or chronic skin breakdown on the residual limb
• Prosthetic socket adjustment within 90 days
• Any condition that would prevent participation and pose increased risk (e.g. shoulder impingement, sub-acromial bursitis, severe arthritis of the shoulder, elbow, wrist, or fingers)
• Injuries of the upper limb within the past 90 days (surgeries, sprains, strains, or fractures).
• Unwillingness/inability to follow instructions Inclusion criteria for able-bodied subjects
• 18 to 85 years of age
• Able to provide independent, informed consent
• Independent function by self-report
• Free of any health ailment that would impair physical function Exclusion criteria for able-bodied subjects
• Younger than 18 or older than 85 years of age
• Any condition that would prevent participation and pose increased risk (e.g. shoulder impingement, sub-acromial bursitis, severe arthritis of the shoulder, elbow, wrist, or fingers)
• No injuries of the upper limb within the past 90 days (surgeries, sprains, strains, or fractures).
• Unwillingness/inability to follow instructions