I understand it’s because a wrinkly brain has a higher surface area than a smooth one. But why is surface are better than volume? What make a surface neuron more influential then an internal neuron when determining intelligence?
In: Biology
Grey matter is the part of the brain that contains the most neurons and governs higher cognition.
As it turns out, grey matter grows in a thin layer around the brain. So, increasing the brain’s surface area, increases the amount of grey matter and thus intelligence.
It is not known why grey matter only grows on the surface, and not completely through the brain.
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