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Sensors 2018, 18(1), 92;

Wireless sEMG System with a Microneedle-Based High-Density Electrode Array on a Flexible Substrate

Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), 37673 Pohang, Korea
Ultimate Fabrication Technology Group, Korea Institute of Industrial Technology (KITECH), 42994 Daegu, Korea
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Received: 31 October 2017 / Revised: 10 December 2017 / Accepted: 25 December 2017 / Published: 30 December 2017
(This article belongs to the Special Issue Biomedical Sensors and Systems 2017)
Full-Text   |   PDF [1598 KB, uploaded 30 December 2017]   |  


Surface electromyography (sEMG) signals reflect muscle contraction and hence, can provide information regarding a user’s movement intention. High-density sEMG systems have been proposed to measure muscle activity in small areas and to estimate complex motion using spatial patterns. However, conventional systems based on wet electrodes have several limitations. For example, the electrolyte enclosed in wet electrodes restricts spatial resolution, and these conventional bulky systems limit natural movements. In this paper, a microneedle-based high-density electrode array on a circuit integrated flexible substrate for sEMG is proposed. Microneedles allow for high spatial resolution without requiring conductive substances, and flexible substrates guarantee stable skin–electrode contact. Moreover, a compact signal processing system is integrated with the electrode array. Therefore, sEMG measurements are comfortable to the user and do not interfere with the movement. The system performance was demonstrated by testing its operation and estimating motion using a Gaussian mixture model-based, simplified 2D spatial pattern. View Full-Text
Keywords: surface electromyography; microneedle array electrode; high-density electrode array surface electromyography; microneedle array electrode; high-density electrode array

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Kim, M.; Gu, G.; Cha, K.J.; Kim, D.S.; Chung, W.K. Wireless sEMG System with a Microneedle-Based High-Density Electrode Array on a Flexible Substrate. Sensors 2018, 18, 92.

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