The triune brain model, proposed by neuroscientist Paul MacLean in the 1960s, is a popular evolutionary framework that divides the human brain into three distinct layers. While often used to explain how survival, emotion, and logic interact, modern neuroscience considers it an oversimplified concept.1. The Reptilian Brain (Basal Ganglia)What it is: The oldest part of the brain, consisting of the brainstem and basal ganglia.Function: Controls primal instincts, autonomic bodily functions (like breathing and heart rate), and basic survival behaviors often summarized as the "four Fs": fighting, fleeing, feeding, and reproduction.2. The Paleomammalian Brain (Limbic System)What it is: The mid-layer, which includes structures like the amygdala, hippocampus, and hypothalamus.Function: The seat of emotions, value judgments, and basic social attachments. It processes whether something is threatening or rewarding and is deeply involved in memory formation.3. The Neomammalian Brain (Neocortex)What it is: The outermost and most recently evolved layer of the brain.Function: Responsible for higher-order cognitive functions, including language, abstract thought, logic, planning, and conscious decision-making.Modern Scientific PerspectiveAlthough the model is a helpful way to conceptualize how we react to stress and emotion, evolutionary biologists and neuroscientists now largely consider the triune brain to be outdated
Our latest video uses captivating "animation" to illustrate the intricate workings of the "brain." We explore core "neuroscience" principles, demonstrating "how the brain works" through dynamic visuals of active "neural connections." Watch as we trace the journey of information along "neural pathways," highlighting essential aspects of "brain function" that govern our thoughts and actions. This visual journey offers a fresh perspective on the most complex organ in the human body.