New research suggests the brain fatigues, causing the body to “believe” it is tired, when in reality it’s the brain itself in need of rest. Says Scientific Council Member Michael Posner, Ph.D., “Brains appear to get fatigued after working for sustained periods of time, particularly if we have to concentrate intensely or deal with a repetitive task." Researchers are now investigating the most optimal ways to restore vitality to a fatigued brain.

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