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Conformable Wearable Electrodes: From Fabrication to Electrophysiological Assessment
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Validating Poly(3,4-ethylene dioxythiophene) Polystyrene Sulfonate-Based Textile Electroencephalography Electrodes by
Granch Berhe Tseghai1,2, Benny Malengier1, Kinde Anlay Fante2
1Department of Materials, Textiles and Chemical Engineering, Ghent University, 9000 Gent, Belgium.
Polymers
|November 13, 2021
Summary
New textile-based electroencephalography (EEG) electrodes offer a stable validation method. These electrodes show improved signal-to-noise ratio and impedance compared to commercial dry electrodes for brain activity monitoring.
Area of Science:
- Biomedical Engineering
- Materials Science
- Neuroscience
Background:
- Developing novel electroencephalography (EEG) electrodes requires rigorous validation.
- Human physiological variability and unknown input signals complicate EEG electrode testing.
- Textile-based electrodes present a promising, flexible alternative for brain activity monitoring.
Purpose of the Study:
- To validate novel textile-based EEG electrodes.
- To compare the performance of textile electrodes against commercial dry electrodes.
- To assess the suitability of textile electrodes for reliable brain activity monitoring.
Main Methods:
- Textile-based EEG electrodes were fabricated using poly(3,4-ethylene dioxythiophene) polystyrene sulfonate:/polydimethylsiloxane coated cotton fabric.
- A textile-based head phantom was utilized for electrode validation and comparison.
- Performance metrics including skin-to-electrode impedance and signal-to-noise ratio were measured.
- EEG data analysis was performed using EEGLAB to evaluate inter-trial coherence and event-related spectral perturbation.
Main Results:
- Textile electrodes demonstrated a 18.9% lower skin-to-electrode impedance compared to Ag/AgCl dry electrodes.
- A 3.45% higher signal-to-noise ratio was achieved with the textile-based electrodes.
- Analysis in EEGLAB revealed identical inter-trial coherence and event-related spectral perturbation graphs for textile and Ag/AgCl electrodes.
Conclusions:
- The developed textile-based EEG electrodes provide a viable and stable alternative for electrode validation.
- These electrodes exhibit superior performance in terms of impedance and signal quality.
- Textile electrodes show potential for effective brain activity monitoring in various applications.
