The main findings of Fan et al.⁷ are summarized in this figure. Thirty-one patients underwent MEG (left) before implantation of a RNS device. Resting-state FC was computed and normalized to healthy individuals. Example FC maps in the alpha frequency range are shown (middle). Regional and global FC measures were used to predict the effectiveness of RNS therapy (right). Responders to RNS exhibited increased FC compared to non-responders. Figure courtesy of study authors.