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Assessing the dependence of the number of EEG channels in the brain networks' modulations.

Authors :
Miraglia F
Tomino C
Vecchio F
Alù F
Orticoni A
Judica E
Cotelli M
Rossini PM
Source :
Brain research bulletin [Brain Res Bull] 2021 Feb; Vol. 167, pp. 33-36. Date of Electronic Publication: 2020 Nov 23.
Publication Year :
2021

Abstract

Aim of the study was to evaluate the influence of the EEG channels number on the brain networks' analysis, to establish whether and how much higher density EEG actually contributes to add supplementary information to brain networks analyses. 59 electrodes EEGs were recorded in 20 healthy subjects in eyes open and closed condition. For each condition, we analyzed the recording dataset of 59 channels, and three sub-datasets obtained by the selection of 44, 30, 19 channels from the 59 ones. Then we computed the EEG sources of current density and evaluated the SW index in the four EEGs data montages. Results showed that in the eyes open condition the number of recording channels influences more the SW index modulation respect that in the eyes closed condition. Conversely, in the eyes closed condition the brain activity is less affected by specific brain regions' activations and the signal's generators produced not significant variations on EEG data and consequently the small world network measure is not affected by the recording channels number. We can conclude that in the eyes closed condition, the 19 EEG channels is an acceptable montage to study brain networks' modulations, to both detect the higher and the lower brain waves' frequencies.<br /> (Copyright © 2020. Published by Elsevier Inc.)

Details

Language :
English
ISSN :
1873-2747
Volume :
167
Database :
MEDLINE
Journal :
Brain research bulletin
Publication Type :
Academic Journal
Accession number :
33242521
Full Text :
https://doi.org/10.1016/j.brainresbull.2020.11.014