Objective To explore the neural dynamics during alternating task switching. Methods In an alternating-runs paradigm, 23 healthy volunteers were asked to categorize Arabic numerals displayed on the screen into either even or odd numbers or judge if the number was greater than 5 according its color cues. The color of the numerals were regularly switched every three trials(switch, nested and pre-switch trials). ANOVA of repeated-measure and paired t-test were used for analysis of the behavioral performance and...