It has been suggested that the band works as a communication mechanism in cortical areas [71]. Beta band activity plays a vital role in inter-neuronal communication in functional networks in working memory [72]. The beta band is associated with attention deficiency in elderly individuals in terms of working memory [73,74], and task-evoked alterations were observed in a beta band network topology [43,73]. A recent study suggested that age-related alterations in EEG network connectivity are correlated with age-related slowing in attention tasks [42]. Therefore, our results of network indices under a visual working memory task are in line with those of previous studies. Furthermore, our classification results reinforce the usefulness of machine learning techniques to distinguish between age-related differences in aging brain networks.
