Triune brain model classifies brain regions through evolutionary lens

Although oversimplified and highly controversial, the triune brain model splits the human brain in three functionally distinct systems based on lose evolutionary criteria. The autonomic nervous system is related to primitive behaviors like breathing, and shows up from reptiles on. The limbic system is tasked with emotions and drives, and shows up from mammals on. The neocortex is tasked with high-level cognition, and only shows up in humans. However, all levels deeply interact with each other.