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. 2020 Aug 20;14:828. doi: 10.3389/fnins.2020.00828

FIGURE 3.

FIGURE 3

To investigate changes in alpha power (8–12 Hz) for the visual alpha stimulation regionally, further analysis was carried out based on nine ROIs. We included three anterior ROIs: left anterior (LA), including electrodes AF7, F7, F5, and F3; central anterior (CA), including electrodes FP1, FPz, FP2, AF3, AF4, F1, Fz, and F2; and right anterior (RA): including electrodes AF8, F4, F6, and F8. Three middle ROIs: left middle (LM), including electrodes FT9, FT7, FC5, FC3, T7, C5, C3, TP9, TP7, CP5, and CP3; central middle (CM), including electrodes FC1, FC2, C1, Cz, C2, CP1, CPz, and CP2; and right middle (RM): including electrodes FC4, FC6, FT8, FT10, C4, C6, T8, CP4, CP6, TP8, and TP10. Finally, three posterior ROIs: left posterior (LP), including electrodes P7, P5, P3, and PO7; central posterior (CP), including electrodes P1, Pz, P2, PO3, POz, PO4, O1, Oz, and O2; and right posterior (RP): including electrodes P4, P6, P8, and PO8.