Brain Functional Changes Accompany Modulatory Effects of Transcranial Direct Current Stimulation in Cognitive Impairment

Transcranial direct current stimulation was administered following standard procedures using a neuroConn DC-Stimulator Plus device (neuroCare Group GmbH, Munich, Germany) with the anode placed at F3 (left DLPFC) and the cathode over the right supraorbital region (Fp2) using 5x7cm electrodes. The anodal tDCS intervention involved daily sessions (between 10-11 a.m.) for 10 consecutive days, wherein a direct current (DC) of 2 mA was administered for 20 minutes (with additional ramp-up and ramp-down phase of 20 seconds each at the beginning and end of the session respectively), adhering to stringent safety measures . None of the participants reported significant adverse effects.