Figure 1

Experimental design. (a) EEG recording montage and stimulation electrodes montage (grey circles). (b) 3D finite element modeling of current density distribution with the bilateral fronto-temporal stimulation montage, using the COMETS toolbox for MATLAB47. (c) Experimental design (KSS: Karolinska Sleepiness Scale40; θ-tACS: 5 Hz transcranial Alternating Current Stimulation; AC: Alternating Current).