Changes in periodic and aperiodic RS-EEG activity following treatment
RS, ADHD
We found reduced bandwidth of the extracted peaks of beta in electrodes above the areas in which active tRNS was applied (lDLPFC and rIFG) and in electrode Fz, compared to the control group. A further reduction in beta bandwidth was seen at 3-weeks of follow-up. Note that there was no significant change in beta power, neither in center of frequency. Furthermore, in Fz, a site that has been shown an effect of tRNS in increasing E/I [Changes in the bandwidth of frequencies are underreported and have been suggested to reflect firing rate of neural population [Our results further highlight the need to use aperiodic analysis of RS-EEG data. Previous spectral power analyses, which refer to the oscillatory brain activity, have suggested that increased ratio of theta to beta power (TBR) during RS in ADHD population could serve as a neural marker, helping with the diagnosis of this population [