Figure 1. Experiment design.

Top: Order of the resting state (RS) and task periods (T) with the number of acquired whole brain scans. The task was separated from the resting state periods by brief instructions. Task periods (T1 to T5) were continuously measured and later split up into five scan periods with the same length. The post-task resting state period (RS2 and RS3) was also measured continuously and split up later for the analyses. The changes from the first resting state period (RS1) to the first task period (T1) as well as from the last task period (T5) to the first post-task resting state period (RS2) are referred to as ‘task switch’. Bottom: Scheme of the vigilance task during the task period. Participants were instructed to detect a red fixation cross (here depicted in bold).