Similar sets of microstates were found across conditions and groups. A EEG microstate topographies obtained from the SD and control groups across positive prospection, negative prospection and math conditions. These microstates include the canonical microstates A–D. Red areas are positive and blue are negative compared to average reference. Microstates are polarity invariant. B Top row shows the EEG microstates maps identified during positive prospection in the control group. Below each microstate is a set of cortical maps demonstrating which regions (red) were most strongly correlated with the particular microstate. PCC the posterior cingulate cortex, MPFC the medial prefrontal cortex