Mental Fatigue Is No Illusion: Scientists Figure Out Why Thinking Hard Makes You Tired - SciTechDaily

It goes without saying that hard physical labor wears you out, but what about hard mental labor? Sitting around thinking hard for hours also makes one feel worn out. Now, scientists have new evidence to explain why this is. Based on their findings, the reason…

New research shows that prolonged, intense cognitive work causes potentially toxic byproducts to build up in the part of the brain known as the prefrontal cortex. It goes without saying that hard ph… [+3606 chars]

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