et al., 2004). A recent case-control study of alcohol dependence obtained significant associations between beta activity and several GABRA2 SNPs (Lydall et al., 2011). Although characterizing EEGs as dominated by beta or not, rather than evaluating quantitative measures of power, this study broadly corroborated the beta power-GABRA2 association. Another genome-wide linkage scan reported an area of linkage between alpha and beta power and a region of chromosome 5. Follow-up association analysis focused on the gene coding for corticotropin releasing hormone binding protein (CRHBP) obtained a significant association with alpha EEG power as well as alcoholism and anxiety (Enoch et al., 2008).
