Triune Brain Model Explained: Reptilian, Limbic, and Neocortex Functions #2320595 (License: Personal Use)

This diagram visualizes Paul MacLean’s triune brain hypothesis, depicting the brain as three interconnected systems: the red reptilian core (instincts like safety and procreation), the yellow limbic system (emotions such as love and fear, shown with a monkey and frog), and the green neocortex (higher-order thinking, symbolized by intellectual tasks like writing and problem-solving). Each layer reflects evolutionary development, with newer structures building atop older ones while retaining their core functions.

Used in psychology, neuroscience, and education pages to explain brain evolution and functional hierarchy; supports user intent to understand emotional vs. rational decision-making or foundational neuroanatomy concepts.