Memory Enhancement Using Transcranial Alternating Current Stimulation

40 Hz tACS applied at a current of 3.2 milliampere peak-to-peak using a NuroStym transcranial electrical stimulation (tES) system of NeuroDevice for four times 12 minutes (48 minutes in total) at the Pz (according to the 10-20 international EEG coordinates)

Sham tACS applied with no effective stimulation between the ramp-up and ramp-down of the current using a NuroStym tES system of NeuroDevice for four times 12 minutes (48 minutes in total) at the Pz (according to the 10-20 international EEG coordinates)