were genome-wide significant findings for other EEG parameters; an association was observed among theta power (and AD) and several variants in SGIP1 (Hodgkinson et al., 2010). A recent GWAS of several EEG measures (including monopolar beta EEG, assessed at the central electrode) in 4,026 adolescent twins and their parents (Malone et al., 2014) did not report any genome-wide significant variants, but replicated the previous associations observed between beta EEG and GABRA2 and expanded our understanding of the genetic epidemiology of other EEG parameters (i.e., resting-state theta EEG).