Canada is the 3rd most sleep deprived country in the world with early a third of Canadians not getting enough sleep. When I’m overtired I feel like I’m just not smart. Perhaps you’ve noticed. Anywho, I might be onto something. Sleep deprivation actually causes the brain to “feed off of neurons and synaptic connections”. Basically your brains is eating itself.
While you sleep your brain is doing a little clean up,getting rid of the least important stuff and making room for new memories.
When you stay awake, the cells actually go into overdrive and start hurting the brain instead.