Limits...
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

Performance evaluation of the proposed MNA electrode compared with the commercial electrodes in terms of insensitivity to perspiration before and after the exercise. Bars: ±1 SD, n = 5. (a) Changes in the baseline RMS amplitudes in relaxed state; (b) changes in the RMS amplitude during the maximum voluntary contraction.
© Copyright Policy
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4541878&req=5

f11-sensors-15-16265: Performance evaluation of the proposed MNA electrode compared with the commercial electrodes in terms of insensitivity to perspiration before and after the exercise. Bars: ±1 SD, n = 5. (a) Changes in the baseline RMS amplitudes in relaxed state; (b) changes in the RMS amplitude during the maximum voluntary contraction.

Mentions: The MNA electrode showed less variation than the wet and dry electrodes before and after exercise (Figure 11). The RMS amplitude of not only the dry electrode, but also the MNA electrode in the rest condition decreased after exercise, because the sweat improved the contact between the electrode and the skin. In the case of the MNA electrode, there was no significant difference (p = 0.19). In contrast, the RMS amplitude of the wet electrode in the rest condition increased (p = 0.04) because the sweat contaminated the electrolyte and decreased its contact stability. Furthermore, both commercial electrodes showed a significant amplitude reduction during maximum voluntary contraction due to sweating. However, the MNA electrode showed an insignificant amplitude decrease, and the amplitude variation was less (p = 0.53). These results indicate that the MNA electrode was relatively insensitive to the effects of sweating.


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)

Performance evaluation of the proposed MNA electrode compared with the commercial electrodes in terms of insensitivity to perspiration before and after the exercise. Bars: ±1 SD, n = 5. (a) Changes in the baseline RMS amplitudes in relaxed state; (b) changes in the RMS amplitude during the maximum voluntary contraction.
© Copyright Policy
Related In: Results  -  Collection

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

f11-sensors-15-16265: Performance evaluation of the proposed MNA electrode compared with the commercial electrodes in terms of insensitivity to perspiration before and after the exercise. Bars: ±1 SD, n = 5. (a) Changes in the baseline RMS amplitudes in relaxed state; (b) changes in the RMS amplitude during the maximum voluntary contraction.
Mentions: The MNA electrode showed less variation than the wet and dry electrodes before and after exercise (Figure 11). The RMS amplitude of not only the dry electrode, but also the MNA electrode in the rest condition decreased after exercise, because the sweat improved the contact between the electrode and the skin. In the case of the MNA electrode, there was no significant difference (p = 0.19). In contrast, the RMS amplitude of the wet electrode in the rest condition increased (p = 0.04) because the sweat contaminated the electrolyte and decreased its contact stability. Furthermore, both commercial electrodes showed a significant amplitude reduction during maximum voluntary contraction due to sweating. However, the MNA electrode showed an insignificant amplitude decrease, and the amplitude variation was less (p = 0.53). These results indicate that the MNA electrode was relatively insensitive to the effects of sweating.

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