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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.


Related in: MedlinePlus

Measured sEMG signal during the maximum voluntary contraction from the FCR before the exercise. Signals were measured independently.
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f10-sensors-15-16265: Measured sEMG signal during the maximum voluntary contraction from the FCR before the exercise. Signals were measured independently.

Mentions: Sweat is released from the glands in the dermis and supplies an additional route for the sEMG signal. Sweat reduces contact stability, distorts the signal and reduces signal amplitude during isometric contraction. To investigate the sensitivity to perspiration, the proposed MNA electrodes were attached to the left forearm flexor carpi radialis (FCR) with commercial wet and dry electrodes. Signals from the electrodes were measured during a maximum voluntary contraction before and after 20 min of stair-climbing exercise. Because the electrode locations were not the same, the measured RMS amplitudes were normalized to compare the tendencies. Raw signals are described in Figure 10.


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)

Measured sEMG signal during the maximum voluntary contraction from the FCR before the exercise. Signals were measured independently.
© Copyright Policy
Related In: Results  -  Collection

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

f10-sensors-15-16265: Measured sEMG signal during the maximum voluntary contraction from the FCR before the exercise. Signals were measured independently.
Mentions: Sweat is released from the glands in the dermis and supplies an additional route for the sEMG signal. Sweat reduces contact stability, distorts the signal and reduces signal amplitude during isometric contraction. To investigate the sensitivity to perspiration, the proposed MNA electrodes were attached to the left forearm flexor carpi radialis (FCR) with commercial wet and dry electrodes. Signals from the electrodes were measured during a maximum voluntary contraction before and after 20 min of stair-climbing exercise. Because the electrode locations were not the same, the measured RMS amplitudes were normalized to compare the tendencies. Raw signals are described in Figure 10.

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.


Related in: MedlinePlus