Lots of fascinating info on the brain in this TED talk.
What is so special about the human brain?
The human brain is puzzling — it is curiously large given the size of
our bodies, uses a tremendous amount of energy for its weight and has a
bizarrely dense cerebral cortex. But: why? Neuroscientist Suzana
Herculano-Houzel puts on her detective's cap and leads us through this
mystery. By making "brain soup," she arrives at a startling conclusion.
The answer is 86 billion.
100 billion neurons was the answer bandied about with no research to back up that statement.
You lose 2 million neurons a minute while your stroke is untreated. I have not heard of any calculation of how many neurons are lost during the neuronal cascade of death.
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