Why are the folds in the human brain important? What’s different about surface area vs sheer volume?
In: Biology
It seems that for some reason, the brain puts all its grey matter on the surface. Grey matter is the body of neurones, including the bits that connect them to other neurones. The white matter inside the brain is just a bunch of long axons, that are a bit like the railways between cities – there’s not a lot going on, just transporting stuff between two places where lots of stuff is going on. Because grey matter is only found at the surface, wrinkling the brain increases the amount of grey matter that can be had.
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