Imperceptive and reusable dermal surface EMG for lower extremity neuro-prosthetic control and clinical assessment

Surface electromyography (sEMG) sensors play a critical role in diagnosing muscle conditions and enabling prosthetic device control, especially for lower extremity robotic legs. However, challenges arise when utilizing such sensors on residual limbs within a silicon liner worn by amputees, where dyn...

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Bibliographic Details
Published in:Npj flexible electronics 2023-10, Vol.7 (1), p.49-11, Article 49
Main Authors: Park, Jaeu, Jeong, Jinwoong, Kang, Minseok, Pritish, Nagwade, Cho, Youngjun, Ha, Jeongdae, Yea, Junwoo, Jang, Kyung-In, Kim, Hyojin, Hwang, Jumin, Kim, Byungchae, Min, Sungjoon, Kim, Hoijun, Kwon, Soonchul, Pak, ChangSik John, Suh, HyunSuk Peter, Hong, Joon Pio, Lee, Sanghoon
Format: Article
Language:English
Subjects:
631/1647/1453
639/301/1005
639/301/923/1028
Amputation
Chemistry and Materials Science
Design optimization
Durability
Dynamic pressure
Electrodes
Electromyography
Electronics and Microelectronics
Instrumentation
Materials Science
Optical and Electronic Materials
Perspiration
Polymer Sciences
Prostheses
Robot control
Sensors
Signal to noise ratio
Stretchability
Substrates
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Summary:Surface electromyography (sEMG) sensors play a critical role in diagnosing muscle conditions and enabling prosthetic device control, especially for lower extremity robotic legs. However, challenges arise when utilizing such sensors on residual limbs within a silicon liner worn by amputees, where dynamic pressure, narrow space, and perspiration can negatively affect sensor performance. Existing commercial sEMG sensors and newly developed sensors are unsuitable due to size and thickness, or susceptible to damage in this environment. In this paper, our sEMG sensors are tailored for amputees wearing sockets, prioritizing breathability, durability, and reliable recording performance. By employing porous PDMS and Silbione substrates, our design achieves exceptional permeability and adhesive properties. The serpentine electrode pattern and design are optimized to improve stretchability, durability, and effective contact area, resulting in a higher signal-to-noise ratio (SNR) than conventional electrodes. Notably, our proposed sensors wirelessly enable to control of a robotic leg for amputees, demonstrating its practical feasibility and expecting to drive forward neuro-prosthetic control in the clinical research field near future.
ISSN:2397-4621
2397-4621
DOI:10.1038/s41528-023-00282-z