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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.


Structure of the skin with the microneedle array (MNA) electrode.
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f1-sensors-15-16265: Structure of the skin with the microneedle array (MNA) electrode.

Mentions: The skin has multiple layers: an epidermis, a dermis and a subcutaneous tissue (Figure 1). The outer skin layer, the epidermis, consists of a stratum corneum (SC), a stratum granulosum, a stratum spinosum and a stratum basale. The thickness of the epidermis varies considerably between different regions of the body. Cells of the epidermis are produced in the inner layers and migrate to the outer layers. The SC is 10–20 µm thick and is composed of dead cells that protect the underlying tissues. The SC has very high impedance because of its barrier properties. Other layers of the epidermis are composed of living cells that are electrically conductive. The dermis contains blood vessels and nerves with pain receptors. If any object touches the dermis, pain receptors detect the object, and the human brain perceives pain. The goal of the MNA electrode is to penetrate the SC layer and directly contact the living epidermis layer without touching the dermis layer.


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)

Structure of the skin with the microneedle array (MNA) electrode.
© Copyright Policy
Related In: Results  -  Collection

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

f1-sensors-15-16265: Structure of the skin with the microneedle array (MNA) electrode.
Mentions: The skin has multiple layers: an epidermis, a dermis and a subcutaneous tissue (Figure 1). The outer skin layer, the epidermis, consists of a stratum corneum (SC), a stratum granulosum, a stratum spinosum and a stratum basale. The thickness of the epidermis varies considerably between different regions of the body. Cells of the epidermis are produced in the inner layers and migrate to the outer layers. The SC is 10–20 µm thick and is composed of dead cells that protect the underlying tissues. The SC has very high impedance because of its barrier properties. Other layers of the epidermis are composed of living cells that are electrically conductive. The dermis contains blood vessels and nerves with pain receptors. If any object touches the dermis, pain receptors detect the object, and the human brain perceives pain. The goal of the MNA electrode is to penetrate the SC layer and directly contact the living epidermis layer without touching the dermis layer.

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.