Validating Poly(3,4-ethylene dioxythiophene) Polystyrene Sulfonate-Based Textile Electroencephalography Electrodes by a Textile-Based Head Phantom

Tseghai, Granch Berhe; Malengier, Benny; Fante, Kinde Anlay; Langenhove, Lieva Van

doi:10.3390/polym13213629

Cited by 6 publications

(5 citation statements)

References 44 publications

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“…2457.759. An OpenBCI Board with a built-in ADS1299 [9] for impedance testing was also used to assess skin-to-electrode impedance according to Tseghai et al [10], shown in Figure 1c. Besides, a textile head phantom was used to determine the signal-to-noise ratio (SNR) of the textrode according to Tseghai et al [11], shown in Figure 1d.…”

Section: Methodsmentioning

confidence: 99%

Loop Fabric EEG Textrode for Brain Activity Monitoring

Tseghai

Malengier

Fante

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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Recently, metallic dry EEG electrodes have been introduced to overcome the limitation of wet electrodes, as the conductive gel used causes skin irritation and dries out over time. However, the metal dry EEG electrodes have a high weight and a stiff structure that limits them from wearable application. In this work, we have developed a textile-based EEG electrode (textrode) from silver-plated polyamide loop fabric washable up to 100 cycles. The new EEG textrode collects quality signals comparable to commercial dry Ag/AgCl EEG electrodes. The signals were detected at all major EEG bandwidths. In addition, the new textrodes showed a lower skin-to-electrode impedance (-19.23%) than the commercial dry electrode and a higher signal-to-noise ratio (+27.4%). Therefore, these novel textile-based electrodes can be used to monitor brain activity for wearable applications, especially when long-term monitoring is required.

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Section: Methodsmentioning

confidence: 99%

Loop Fabric EEG Textrode for Brain Activity Monitoring

Tseghai

Malengier

Fante

et al. 2023

IOP Conf. Ser.: Mater. Sci. Eng.

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“… Types of EEG electrodes: ( a ) gold cup EEG electrode [ 11 ], under CC by 4.0; ( b ) capacitive EEG electrode [ 17 ], under CC by 4.0; ( c ) dry EEG comb electrode [ 28 ], under CC by 4.0; ( d ) dry EEG flat electrode [ 29 ], under CC by 4.0. …”

Section: Figurementioning

confidence: 99%

Hook Fabric Electroencephalography Electrode for Brain Activity Measurement without Shaving the Head

Tseghai,

Malengier,

Fante

et al. 2023

Polymers

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In this research, novel electroencephalogram (EEG) electrodes were developed to detect high-quality EEG signals without the requirement of conductive gels, skin treatments, or head shaving. These electrodes were created using electrically conductive hook fabric with a resistance of 1 Ω/sq. The pointed hooks of the conductive fabric establish direct contact with the skin and can penetrate through hair. To ensure excellent contact between the hook fabric electrode and the scalp, a knitted-net EEG bridge cap with a bridging effect was employed. The results showed that the hook fabric electrode exhibited lower skin-to-electrode impedance compared to the dry Ag/AgCl comb electrode. Additionally, it collected high-quality signals on par with the standard wet gold cups and commercial dry Ag/AgCl comb electrodes. Moreover, the hook fabric electrode displayed a higher signal-to-noise ratio (33.6 dB) with a 4.2% advantage over the standard wet gold cup electrode. This innovative electrode design eliminates the need for conductive gel and head shaving, offering enhanced flexibility and lightweight characteristics, making it ideal for integration into textile structures and facilitating convenient long-term monitoring.

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“…13,14 For example, EEG is used to diagnose epilepsy, sleep disorders, and attention-deficit hyperactivity disorder. 15 There are five common types of brain biosignal frequency ranges in the medical sector, denoted by the Greek alphabet: delta (0.5-3 Hz), theta (4-7 Hz), alpha (8-13 Hz), beta (13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), and gamma (30-100 Hz). 16 Postsynaptic potential is responsible for brain electroactivity.…”

Section: Basics Of Eeg and Current Measurement Devicesmentioning

confidence: 99%

“…15 There are five common types of brain biosignal frequency ranges in the medical sector, denoted by the Greek alphabet: delta (0.5-3 Hz), theta (4-7 Hz), alpha (8-13 Hz), beta (13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30), and gamma (30-100 Hz). 16 Postsynaptic potential is responsible for brain electroactivity. An electric dipole is created due to the current flow in the brain.…”

Section: Basics Of Eeg and Current Measurement Devicesmentioning

confidence: 99%

Impedance evaluation of textile electrodes for EEG measurements

Rahman

Mattila

Janka

et al. 2022

Textile Research Journal

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In this paper, we evaluated the impedance of textile electrodes for electroencephalography measurements. We compared the commercially available standard dry silver/silver chloride dry electrodes, copper-based, and silver-based textile electrodes by measuring impedance on the skin. First, on dry skin, the impedance range of the electrodes was 93–350 kΩ at 0 min; after 60 min, the range was 20–56 kΩ. The commercial electrode showed the lowest impedance of 20 kΩ, and the silver-based textile electrode showed the highest impedance of 56 kΩ in dry skin conditions after 60 min. When tap water was applied as an electrolyte, the impedance range was 13–15 kΩ at 0 min; after 60 min, the range was 17–22 kΩ for all three types of electrodes. In this case, the copper-based textile electrode showed the lowest impedance of 17 kΩ and the commercial electrode showed the highest impedance of 22 kΩ after 60 min. When saline water was applied as an electrolyte, at 0 min, the impedance range was 8–11 kΩ; after 60 min, the range became 11–12 kΩ for all three types of electrodes. Thus, all electrodes showed similar results. It was concluded that the copper-based textile electrodes were more suitable than the silver-based textile electrodes and comparable to commercial electrodes regarding impedance in all three skin conditions.

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Validating Poly(3,4-ethylene dioxythiophene) Polystyrene Sulfonate-Based Textile Electroencephalography Electrodes by a Textile-Based Head Phantom

Cited by 6 publications

References 44 publications

Loop Fabric EEG Textrode for Brain Activity Monitoring

Loop Fabric EEG Textrode for Brain Activity Monitoring

Hook Fabric Electroencephalography Electrode for Brain Activity Measurement without Shaving the Head

Impedance evaluation of textile electrodes for EEG measurements

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