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Updated: Jul 3, 2026
07:59
Therapy Interventions for Upper Limb Amputees Undergoing Selective Nerve Transfers
Published on: October 29, 2021
Compensatory movements of transradial prosthesis users during common tasks
Stephanie L Carey1, M Jason Highsmith, Murray E Maitland
1Department of Mechanical Engineering, University of South Florida, Tampa, FL 33620, USA. scarey3@eng.usf.edu
Clinical Biomechanics (Bristol, Avon)
|August 5, 2008
Summary
Transradial prosthesis users exhibit unique compensatory movements, like torso bending, to adapt to limited wrist and forearm function. Bracing non-amputees partially mimics these adaptations, but the magnitude of compensation is greater in prosthesis users.
Area of Science:
- Biomechanics
- Prosthetics
- Human Motion Analysis
Background:
- Previous research documented upper limb movements in daily activities for healthy individuals.
- This study investigated compensatory upper extremity and torso motions in transradial prosthesis users.
- The research also aimed to determine if bracing simulates prosthesis use in non-amputee subjects.
Purpose of the Study:
- To analyze compensatory upper extremity and torso movements in transradial prosthesis users during common tasks.
- To compare these movements with those of non-amputee subjects, both braced and unbraced.
- To assess the efficacy of bracing as a simulation for prosthesis use.
Main Methods:
- Seven transradial myoelectric prosthesis users and ten non-amputee volunteers participated.
- Non-amputee subjects performed tasks with and without bracing to simulate prosthesis use.
- Optical motion analysis captured glenohumeral (shoulder) joint, elbow joint, and torso range of motion.
Main Results:
- Transradial prosthesis users demonstrated task-dependent compensatory strategies, including torso bending for tasks like opening a door.
- For a box lift task, users relied more on the sound arm and torso bending.
- During drinking, prosthesis use led to decreased shoulder flexion and increased elbow flexion, differing from steering wheel tasks where users resembled non-amputees.
Conclusions:
- Understanding compensatory motions in transradial prosthesis users offers insights into improving prosthetic design by addressing limitations in forearm and wrist function.
- While bracing in intact subjects showed similar compensation mechanisms, prosthesis users exhibited a greater magnitude of compensation.
- These findings highlight the complex adaptations required for individuals with transradial limb differences.
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