Advancing towards Ubiquitous EEG, Correlation of In-Ear EEG with Forehead EEG
- Wearable EEG has gained popularity in recent years driven by promising uses outside of clinics and research. The ubiquitous application of continuous EEG requires unobtrusive form-factors that are easily acceptable by the end-users. In this progression, wearable EEG systems have been moving from full scalp to forehead and recently to the ear. The aim of this study is to demonstrate that emerging ear-EEG provides similar impedance and signal properties as established forehead EEG. EEG data using eyes-open and closed alpha paradigm were acquired from ten healthy subjects using generic earpieces fitted with three custom-made electrodes and a forehead electrode (at Fpx) after impedance analysis. Inter-subject variability in in-ear electrode impedance ranged from 20 kΩ to 25 kΩ at 10 Hz. Signal quality was comparable with an SNR of 6 for in-ear and 8 for forehead electrodes. Alpha attenuation was significant during the eyes-open condition in all in-ear electrodes, and it followed the structure of power spectral density plots of forehead electrodes, with the Pearson correlation coefficient of 0.92 between in-ear locations ELE (Left Ear Superior) and ERE (Right Ear Superior) and forehead locations, Fp1 and Fp2, respectively. The results indicate that in-ear EEG is an unobtrusive alternative in terms of impedance, signal properties and information content to established forehead EEG.
Verfasserangaben: | Swati Mandekar, Abigail Holland, Moritz Thielen, Mehdi BehbahaniORCiD, Mark Melnykowycz |
---|---|
DOI: | https://doi.org/10.3390/s22041568 |
ISSN: | 1424-8220 |
Titel des übergeordneten Werkes (Englisch): | Sensors |
Verlag: | MDPI |
Verlagsort: | Basel |
Dokumentart: | Wissenschaftlicher Artikel |
Sprache: | Englisch |
Erscheinungsjahr: | 2022 |
Datum der Publikation (Server): | 21.02.2022 |
Freies Schlagwort / Tag: | biopotential electrodes; correlation; forehead EEG; impedance spectroscopy; in-ear EEG |
Jahrgang: | 22 |
Ausgabe / Heft: | 4 |
Erste Seite: | 1 |
Letzte Seite: | 19 |
Link: | https://doi.org/10.3390/s22041568 |
Zugriffsart: | weltweit |
Fachbereiche und Einrichtungen: | FH Aachen / Fachbereich Medizintechnik und Technomathematik |
FH Aachen / IfB - Institut für Bioengineering | |
collections: | Verlag / MDPI |