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Curved Microneedle Array-Based sEMG Electrode for Robust Long-Term Measurements and High Selectivity.

Kim M, Kim T, Kim DS, Chung WK - Sensors (Basel) (2015)

Bottom Line: However, conventional electrodes are not appropriate for long-term measurements and are easily influenced by the environment, so the range of applications of sEMG is limited.The results show that the proposed electrode is robust to perspiration and can maintain a high-quality measuring ability for over 8 h.The proposed electrode also has high selectivity for motion compared with a commercial wet electrode and dry electrode.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea. minjaekim@postech.ac.kr.

ABSTRACT
Surface electromyography is widely used in many fields to infer human intention. However, conventional electrodes are not appropriate for long-term measurements and are easily influenced by the environment, so the range of applications of sEMG is limited. In this paper, we propose a flexible band-integrated, curved microneedle array electrode for robust long-term measurements, high selectivity, and easy applicability. Signal quality, in terms of long-term usability and sensitivity to perspiration, was investigated. Its motion-discriminating performance was also evaluated. The results show that the proposed electrode is robust to perspiration and can maintain a high-quality measuring ability for over 8 h. The proposed electrode also has high selectivity for motion compared with a commercial wet electrode and dry electrode.

No MeSH data available.


Images of the PDMS layer for a single electrode. The thickness of the band depends on the electrode thickness. (a) PDMS layer without Velcro tape; (b) PDMS layer with the fixed MNA electrode.
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f8-sensors-15-16265: Images of the PDMS layer for a single electrode. The thickness of the band depends on the electrode thickness. (a) PDMS layer without Velcro tape; (b) PDMS layer with the fixed MNA electrode.

Mentions: PDMS is an appropriate material for a wearable band. The flexibility of PDMS allows the system to compensate for skin deformation, and the biocompatibility of PDMS ensures that it does not cause adverse effects to the user, even in long-term use. The fabrication process is described in Figure 7. A thin PDMS layer, which has holes fitted to the MNA electrode, was fabricated as shown in Figure 7a. The number of holes depends on the configuration of the sEMG channels. Then, the fabricated MNA electrodes were fixed to the PDMS layer, and one side of the Velcro tape was attached to the PDMS layer (Figure 7b). Finally, the PDMS layer was attached to the skin and fixed using the other side of the Velcro tape. The fabricated MNA electrode and the band system are shown in Figures 8 and 9.


Curved Microneedle Array-Based sEMG Electrode for Robust Long-Term Measurements and High Selectivity.

Kim M, Kim T, Kim DS, Chung WK - Sensors (Basel) (2015)

Images of the PDMS layer for a single electrode. The thickness of the band depends on the electrode thickness. (a) PDMS layer without Velcro tape; (b) PDMS layer with the fixed MNA electrode.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4541878&req=5

f8-sensors-15-16265: Images of the PDMS layer for a single electrode. The thickness of the band depends on the electrode thickness. (a) PDMS layer without Velcro tape; (b) PDMS layer with the fixed MNA electrode.
Mentions: PDMS is an appropriate material for a wearable band. The flexibility of PDMS allows the system to compensate for skin deformation, and the biocompatibility of PDMS ensures that it does not cause adverse effects to the user, even in long-term use. The fabrication process is described in Figure 7. A thin PDMS layer, which has holes fitted to the MNA electrode, was fabricated as shown in Figure 7a. The number of holes depends on the configuration of the sEMG channels. Then, the fabricated MNA electrodes were fixed to the PDMS layer, and one side of the Velcro tape was attached to the PDMS layer (Figure 7b). Finally, the PDMS layer was attached to the skin and fixed using the other side of the Velcro tape. The fabricated MNA electrode and the band system are shown in Figures 8 and 9.

Bottom Line: However, conventional electrodes are not appropriate for long-term measurements and are easily influenced by the environment, so the range of applications of sEMG is limited.The results show that the proposed electrode is robust to perspiration and can maintain a high-quality measuring ability for over 8 h.The proposed electrode also has high selectivity for motion compared with a commercial wet electrode and dry electrode.

View Article: PubMed Central - PubMed

Affiliation: Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang 790-784, Korea. minjaekim@postech.ac.kr.

ABSTRACT
Surface electromyography is widely used in many fields to infer human intention. However, conventional electrodes are not appropriate for long-term measurements and are easily influenced by the environment, so the range of applications of sEMG is limited. In this paper, we propose a flexible band-integrated, curved microneedle array electrode for robust long-term measurements, high selectivity, and easy applicability. Signal quality, in terms of long-term usability and sensitivity to perspiration, was investigated. Its motion-discriminating performance was also evaluated. The results show that the proposed electrode is robust to perspiration and can maintain a high-quality measuring ability for over 8 h. The proposed electrode also has high selectivity for motion compared with a commercial wet electrode and dry electrode.

No MeSH data available.