Comparison of Outcome Measures for Upper Extremity Prosthetic Users Utilizing Joint-Torque Feedback and Vibrotactile Feedback
Date of Award
Spring 5-9-2026
Document Type
Non Thesis
Degree Name
Master of Science in Orthotics and Prosthetics
Department
Kinesiology
First Advisor
Amy Funke
Abstract
Upper limb prostheses (ULP) are often abandoned due to a lack of sensory feedback, discomfort, and cognitive burden. While body-powered (BP) prostheses provide joint-torque feedback (JTF) for enhanced proprioception, myoelectric prostheses rely on visual feedback (VF), increasing cognitive effort. Vibrotactile feedback (VTF) is a proposed solution, but its real-world effectiveness remains unclear. This study compared functional outcomes and user perceptions between BP prostheses with JTF and myoelectric prostheses with VTF. Twenty-four trans-radial amputees transitioned between these devices and completed functional tests—including the Box and Blocks Test, Cups Relocation Task, and Clothespin Relocation Task—under visual and non-visual conditions. Subjective experiences were assessed using surveys and a modified NASA Task-Load Index (NASA-TLX). Participants used their experimental prostheses at home for six months before reassessment. Findings provided critical insights into the impact of sensory feedback on prosthetic performance, acceptance, and user satisfaction. This research will guide clinical recommendations, improve prosthetic design, and support insurance justification for advanced prosthetic technology, ultimately enhancing prosthesis adoption and user experience.