Resting-state is the “present” momentary state of brain during wakefulness in the absence of doing an explicit task. Resting-state methods are widely used in studies to investigate stable characteristics of intrinsic brain organization or spontaneous brain interaction. In studying baseline followed by an active task, it was found that just measuring the resting activity predicted performance on active tasks without having to measure the brain during the task. That is, the resting-state activity is fairly predictive of brain activity during an active task inside the scanner. As a consequence, today, there are fewer active task studies and more resting-state studies.

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