Method: grow >10^8 neurons (or appropriate stem cells) in vitro, and then put them into a human brain.
There have been some experiments along these lines, at a smaller scale, aimed at treating brain damage.
The idea is simply to scale up the brain’s computing wetware.
I know that much of the difference in ~intelligence across vertebrates is attributed to the pallial neuron count, and that neurogenesis in the dentate gyrus seems to be an important factor in (some forms of) adult learning (at least from mice experiments, etc.), but I’m curious whether there’s any more direct/experimental evidence that adding more neurons to a generally healthy (rather than damaged) adult brain would increase cognitive performance along whatever dimension.
I know that much of the difference in ~intelligence across vertebrates is attributed to the pallial neuron count, and that neurogenesis in the dentate gyrus seems to be an important factor in (some forms of) adult learning (at least from mice experiments, etc.), but I’m curious whether there’s any more direct/experimental evidence that adding more neurons to a generally healthy (rather than damaged) adult brain would increase cognitive performance along whatever dimension.