I remember turnover rate is just under 2%. So negative. You get a few hundred every day and rate per day declines as we age. That said there is a use it or lose it component to neurons. They’re very expensive energy wise.
I saw they discovered something they’re calling dark neurons recently. Haven’t looked into it. Question may be complicated by whatever that is.
Brain stuff killed my dad, tried to kill my brother, almost killed me. I’m just well read on the topic.
We can make new neurons but they are pretty.. unmapped?..so for the most part we lose them slowly.
Yes we do keep the same neurons iirc but our brain has quite the elaborate cleaning system and prunes neurons and paths to be more efficient… like the gleial cells around neurons we often thought..well as the name implies just to be more or less glue … turns out no they are quite the elaborate cleaning system and they serve more functions
More neurons doesnt necissarily mean less smart. It can also mean more efficient function
Your science is outdated, the brain does regenerate neurons and nerve cells albeit not perfectly. [Read about BDNF.](https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&cad=rja&uact=8&ved=2ahUKEwiVl9H87Pf8AhXRl2oFHZ6gDwkQFnoECBgQAQ&url=https%3A%2F%2Fwww.ncbi.nlm.nih.gov%2Fpmc%2Farticles%2FPMC4697050%2F&usg=AOvVaw1dRPMSQPFVLuQnYMRR8ccA)
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