Fig. 3

The study timeline explains three stages of assessments including pre-intervention (baseline), intervention (treatment), and follow-up (post-intervention). Pre-intervention period for 1 month, 2-week anodal HD-tDCS treatment period (W1, W2), and a 3-month follow-up period from the first day of stimulation. One month before treatment, MRI, Peterson’s criteria, and DBI tests were also done. Montreal Cognitive Assessment (MoCA) test was taken for each patient 1 month before treatment (M_-1), the second week (W2), and the first (M1) and the third month (M3). Quality of Life in Alzheimer’s Disease (QoLAD) at baseline and the third month was measured