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. 2022 Mar 10;16:842420. doi: 10.3389/fnins.2022.842420

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Copyright © 2022 Rusiniak, Bornfleth, Cho, Wolak, Ille, Berg and Scherg.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The comparison of Eyes-Opened and Eyes-Closed state for both raw (A) and PCA-S artifact corrected data (B). At the top of each sub-figure an example of the same 30 s of recording is shown, in which the transition from eyes-opened to eyes-closed state occurs in the middle. 20 electrodes are shown (every second channel from the 64-channel montage that was used). Below, an FFT heat map for both states, respectively, is shown, showing each recorded channel (grouped by brain lobes) along with the alpha rhythm topography.