![]() We conclude that force transmission efficiency is closely related to body posture configuration. We found that increased shoulder flexion, scapular abduction, elbow extension, and the placement of the ring harness near the vertebra C7 correlate with higher gripper operation efficiency, defined as the ratio of grip force to cable tension. It was fitted with a transradial prosthesis and used to systematically test multiple configurations. To find the optimal operation of the prosthesis where the activation force is minimized and the grip force is maximized.Ī computer-controlled robotic amputee simulator capable of rapidly testing multiple elbow, shoulder, and scapular combinations of the residual human arm was constructed. Since body-powered prostheses are commonplace, understanding their optimal operation to mitigate these drawbacks would be clinically meaningful. This prosthesis requires large muscle forces and great concentration by the patient, often leading to discomfort, muscle fatigue, and skin breakdown, limiting the capacity of the amputee to conduct daily activities. ![]() Transradial body-powered prostheses are extensively used by upper-limb amputees.
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