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What exactly happens to your brain when you feel mentally exhausted?

Comments (1)
  1. Nicholas says:

    I’ll be honest I thought this article was more about what happens to the brain when you’ve used a lot of mental energy doing challenging tasks (I often find myself unable to focus and having slight headaches after doing something challenging for a long period of time) rather than how your brain reacts during the sleep/awake cycle. Interesting article all the same, thanks

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