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Validation of Electroencephalographic Recordings Obtained with a Consumer-Grade, Single Dry Electrode, Low-Cost Device: A Comparative Study

The functional validity of the signal obtained with low-cost electroencephalography (EEG) devices is still under debate. Here, we have conducted an in-depth comparison of the EEG-recordings obtained with a medical-grade golden-cup electrodes ambulatory device, the SOMNOwatch + EEG-6, vs those obtain...

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Autores principales: Rieiro, Héctor, Diaz-Piedra, Carolina, Morales, José Miguel, Catena, Andrés, Romero, Samuel, Roca-Gonzalez, Joaquin, Fuentes, Luis J., Di Stasi, Leandro L.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6630628/
https://www.ncbi.nlm.nih.gov/pubmed/31234599
http://dx.doi.org/10.3390/s19122808
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author Rieiro, Héctor
Diaz-Piedra, Carolina
Morales, José Miguel
Catena, Andrés
Romero, Samuel
Roca-Gonzalez, Joaquin
Fuentes, Luis J.
Di Stasi, Leandro L.
author_facet Rieiro, Héctor
Diaz-Piedra, Carolina
Morales, José Miguel
Catena, Andrés
Romero, Samuel
Roca-Gonzalez, Joaquin
Fuentes, Luis J.
Di Stasi, Leandro L.
author_sort Rieiro, Héctor
collection PubMed
description The functional validity of the signal obtained with low-cost electroencephalography (EEG) devices is still under debate. Here, we have conducted an in-depth comparison of the EEG-recordings obtained with a medical-grade golden-cup electrodes ambulatory device, the SOMNOwatch + EEG-6, vs those obtained with a consumer-grade, single dry electrode low-cost device, the NeuroSky MindWave, one of the most affordable devices currently available. We recorded EEG signals at Fp1 using the two different devices simultaneously on 21 participants who underwent two experimental phases: a 12-minute resting state task (alternating two cycles of closed/open eyes periods), followed by 60-minute virtual-driving task. We evaluated the EEG recording quality by comparing the similarity between the temporal data series, their spectra, their signal-to-noise ratio, the reliability of EEG measurements (comparing the closed eyes periods), as well as their blink detection rate. We found substantial agreement between signals: whereas, qualitatively, the NeuroSky MindWave presented higher levels of noise and a biphasic shape of blinks, the similarity metric indicated that signals from both recording devices were significantly correlated. While the NeuroSky MindWave was less reliable, both devices had a similar blink detection rate. Overall, the NeuroSky MindWave is noise-limited, but provides stable recordings even through long periods of time. Furthermore, its data would be of adequate quality compared to that of conventional wet electrode EEG devices, except for a potential calibration error and spectral differences at low frequencies.
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spelling pubmed-66306282019-08-19 Validation of Electroencephalographic Recordings Obtained with a Consumer-Grade, Single Dry Electrode, Low-Cost Device: A Comparative Study Rieiro, Héctor Diaz-Piedra, Carolina Morales, José Miguel Catena, Andrés Romero, Samuel Roca-Gonzalez, Joaquin Fuentes, Luis J. Di Stasi, Leandro L. Sensors (Basel) Article The functional validity of the signal obtained with low-cost electroencephalography (EEG) devices is still under debate. Here, we have conducted an in-depth comparison of the EEG-recordings obtained with a medical-grade golden-cup electrodes ambulatory device, the SOMNOwatch + EEG-6, vs those obtained with a consumer-grade, single dry electrode low-cost device, the NeuroSky MindWave, one of the most affordable devices currently available. We recorded EEG signals at Fp1 using the two different devices simultaneously on 21 participants who underwent two experimental phases: a 12-minute resting state task (alternating two cycles of closed/open eyes periods), followed by 60-minute virtual-driving task. We evaluated the EEG recording quality by comparing the similarity between the temporal data series, their spectra, their signal-to-noise ratio, the reliability of EEG measurements (comparing the closed eyes periods), as well as their blink detection rate. We found substantial agreement between signals: whereas, qualitatively, the NeuroSky MindWave presented higher levels of noise and a biphasic shape of blinks, the similarity metric indicated that signals from both recording devices were significantly correlated. While the NeuroSky MindWave was less reliable, both devices had a similar blink detection rate. Overall, the NeuroSky MindWave is noise-limited, but provides stable recordings even through long periods of time. Furthermore, its data would be of adequate quality compared to that of conventional wet electrode EEG devices, except for a potential calibration error and spectral differences at low frequencies. MDPI 2019-06-23 /pmc/articles/PMC6630628/ /pubmed/31234599 http://dx.doi.org/10.3390/s19122808 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Rieiro, Héctor
Diaz-Piedra, Carolina
Morales, José Miguel
Catena, Andrés
Romero, Samuel
Roca-Gonzalez, Joaquin
Fuentes, Luis J.
Di Stasi, Leandro L.
Validation of Electroencephalographic Recordings Obtained with a Consumer-Grade, Single Dry Electrode, Low-Cost Device: A Comparative Study
title Validation of Electroencephalographic Recordings Obtained with a Consumer-Grade, Single Dry Electrode, Low-Cost Device: A Comparative Study
title_full Validation of Electroencephalographic Recordings Obtained with a Consumer-Grade, Single Dry Electrode, Low-Cost Device: A Comparative Study
title_fullStr Validation of Electroencephalographic Recordings Obtained with a Consumer-Grade, Single Dry Electrode, Low-Cost Device: A Comparative Study
title_full_unstemmed Validation of Electroencephalographic Recordings Obtained with a Consumer-Grade, Single Dry Electrode, Low-Cost Device: A Comparative Study
title_short Validation of Electroencephalographic Recordings Obtained with a Consumer-Grade, Single Dry Electrode, Low-Cost Device: A Comparative Study
title_sort validation of electroencephalographic recordings obtained with a consumer-grade, single dry electrode, low-cost device: a comparative study
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6630628/
https://www.ncbi.nlm.nih.gov/pubmed/31234599
http://dx.doi.org/10.3390/s19122808
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