No aftereffects of high current density 10 Hz and 20 Hz tACS on sensorimotor alpha and beta oscillations.

ABSTRACT: Application of transcranial alternating current stimulation (tACS) is thought to modulate ongoing brain oscillations in a frequency-dependent manner. However, recent studies report various and sometimes inconsistent results regarding its capacity to induce changes in cortical activity beyond the stimulation period. Here, thirty healthy volunteers participated in a randomized, cross-over, sham-controlled, double-blind study using EEG to measure the offline effects of tACS on alpha and beta power. Sham and high current density tACS (1 mA; 10 Hz and 20 Hz; 0.32 mA/cm²) were applied for 20 min over bilateral sensorimotor areas and EEG was recorded at rest before and after stimulation for 20 min. Bilateral tACS was not associated with significant changes in local alpha and beta power

SUBMITTER: Lafleur LP 

PROVIDER: S-EPMC8560917 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature