ELECTROMYOGRAPHIC SYNCHRONIZATION IN THE FABRICATION OF DYNAMIC 3D PRINTED HAND PROSTHESIS- AN ORIGINAL STUDY

Noorul Rizwana. A, Vivek Shankar. P, Arun kumar. CS, Suganya Srinivasan, Murugesan Krishnan, Peter John, Brintha Jei

Abstract


Aim: To fabricate a dynamic hand prosthesis using simple sensomotors and programming it using electromyographic synchronization to achieve functional movements at minimal cost.
Materials and methods: The primary design of the prosthesis was done digitally and it was simulated using 3-D printing and milled with light weight polyurethane material. For incorporating the dynamic movements into the prosthesis, motors and electromotors (flex sensomotors) which worked based on the hex code programming were used. These additives allowed free movements and functional movements in the prosthesis. Using electromyography (EMG) healthier neuromuscular coordination was synchronized from a volunteer to the prosthesis. Electromyography worked based on the recording of muscle amplitude in microamperes with two sensors. One sensor transmitted the actual amplitude levels of healthier muscular movements while the other sensor intensified or deranged the value based on the muscle threshold of the individual. The amplitude values were recorded in C code programming format, which is human interfacing language. This was then compiled into the assembly programming for the ease of evaluation.

Results: Based on the design, functional and dynamic movements were obtained in the hand prosthesis, using the synchronized EMG signals, which improved the efficiency of rehabilitation.

Conclusion: Functionally active hand prosthesis at minimal cost will pave way for rehabilitating patients and improving their quality of life.


Keywords


Dynamic prosthesis, sensomotors, electromyography, hex code programming.

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