Eli5 Why when I’m tired my brain barely functions?

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Like seriously, it feels like I’m either high or drunk. Why does it feel like I completely forget basic things. Like once I was so tired I was waiting for my PC to turn on without pressing it. Why do we slowly degrade in function the more energy we use.

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Anonymous 0 Comments

The long and short of it is that the sensation of being tired is actually a side effect, the drop off in performance is what sleep is trying to fix. By late afternoon the brain is exhausted, waste products everywhere and a giant mess of memories to sort through. All this slows the brain down and we take this as being tired.

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