Every time I ask this question, I feel like the answer sidesteps an actual explanation. Yes, I understand that the folded, wrinkled shape allows for more surface area. The heart of my question is WHY is that important? Like, if the outermost layer of the brain is important, why couldn’t it just be a thicker layer instead of just squishing more outermost layer into a wrinkled shape?
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Simple straightforward answer, most of our brains processing capacity is done on the surface of the brain. Wrinkles increase the surface area.
But then you’re asking a why question. That’s a lot harder to answer. Why is the processing done on the surface and not more Evenly distributed? Because that’s what evolution converged on. Evolution relies heavily on chance and does not guarantee the absolute best solution.
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