the 29 connections (45%) were bilateral hippocampal (PHG) connections with other DMN nodes (bilateral PCC, bilateral ACC, R.IPL, bilateral PFC, bilateral LTC), in which AUD showed hyperconnectivity in 12 connections across all frequency bands, and hypoconnectivity (i.e., decreased FC) across L.ACC–R.PHG in beta band. Four of the 29 significant connections were common across frequency bands (i.e., represented in more than one frequency bands excepting the theta band), in which AUD showed either hyper- or hypo-connectivity than CTL group: (i) R.PCC–R.PFC (hyperconnectivity in delta, beta, and gamma bands); (ii) R.PFC–L.LTC (hyperconnectivity in alpha and beta bands); (iii) R.LTC–R.PHG (hyperconnectivity in delta and alpha bands); and (iv) L.ACC–R.PHG (hypoconnectivity in beta band and hyperconnectivity in gamma band). AUD individuals also showed increased impulsivity in all categories and poor neuropsychological performance in visuo-spatial working memory (i.e., lower memory span for both forward and backward trials, and increased time taken during forward trials).
