> It would stand to reason that since the cerebral cortex > is the home of our higher-thinking abilities ... Not only that, but the prefrontal cortex (PFC)

> It would stand to reason that since the cerebral cortex > is the home of our higher-thinking abilities ... Not only that, but the prefrontal cortex (PFC) is one particular cortical region that has become enlarged in humans with respect to other great apes. PFC is generally implicated in "higher" reasoning, metacognition, and other executive functions. It's possible that cro-magnon brains were larger but that additional volume was allocated to other functions (balance or smell, for example) and that they still had smaller frontal lobes.