Fig. 1

Upper panel: Grand-averaged time–frequency maps over C3 electrodes for the subjects with lower trait anxiety (LTA, n = 20) and higher trait anxiety (HTA, n = 20) during the time window from ‒1000 to 800 ms relative to button-press to Go trials. The diagrams were converted into percentage changes of event-related desynchronization (ERD) and event-related synchronization (ERS) relative to baseline. Lower panel: The scalp topographies of α ERD, β ERD, α ERS, and β ERS in each group. The asterisks represent the C3 electrodes