Figure 4
From: Gamma tACS over the temporal lobe increases the occurrence of Eureka! moments
EEG changes after tACS. Line plots represent the average spectral power in the low-γ (30–45 Hz) (a) and α (8–12 Hz) (b) frequency bands before and after stimulation, for each recording electrode. Values are reported for each stimulation condition, including Sham. An increase in the power of γ oscillations over T8 (i.e., the site of stimulation) and T7 (i.e, the homologous region in the contralateral hemisphere) was found after 40 Hz-tACS, while a generalized increase in α power is present for almost all the electrodes, possibly due to increase drowsiness.
