Cecchetti et al. (2021) grouped MCI patients based on CSF tau and Aβ42 ratios (MCIpos ≥ 0.13, MCIneg < 0.13). AD and MCIpos patients showed higher θ density in the central, parietal, and occipital lobes compared to MCIneg and healthy individuals (Cecchetti et al., 2021). Here, MAPT is linked to Alzheimer disease.