Brain folding study defines two distinct groups of mammals

Programs that control the production of neurons during brain development determine how the brain folds, researchers report. The researchers analyzed the gyrencephaly index, indicating the degree of cortical folding, of 100 mammalian brains and identified a threshold value that separates mammalian species into two distinct groups: Those above the threshold have highly folded brains, whereas those below it have only slightly folded or unfolded brains. The research team also found that differences in cortical folding did not evolve linearly across species. —> Read More Here

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