In this study, we investigated the effects of AD and LBD on the patterns of spectral power computation of EEG acquired from a low-density scalp EEG in amyloid PET-confirmed AD and DAT PET-confirmed LBD patients whose diagnoses were based on meticulous clinical evaluation and supported by18F-fluorodeoxyglucose (FDG) PET8,40. This evidence concerns the gene SLC6A3 and Alzheimer disease.