Most brain models of human behavior are cortico-centric and assume that behavior is primarily driven by the neocortex. The cortico-centric model assumes the primary purpose of the brain is to “think.” It focuses on cortico-cortical interactions, which emphasize the “lateral” or “horizontal” organization of the brain. However, this paradigm is incomplete because it fails to recognize that the primate brain develops “bottom-up,” making connections from proximal to distal regions.