Introduction

Humans are complex beings with layered brain functions that influence everything from survival instincts to advanced reasoning. JJ Jerome sheds light on the “three-brain theory,” explaining how the reptilian, limbic, and neocortex layers work together to form our behavior, emotions, and social dynamics. Understanding the three-brain theory provides insights into how our instincts and cognitive functions coexist, often with competing motivations.

The Reptilian Brain and Basic Survival

The oldest part of the human brain, often called the reptilian brain, is responsible for our basic survival functions. This part of the brain governs instincts like breathing, hunger, and mating, which remain at the core of human survival. JJ Jerome explains how this primitive brain operates much like that of reptiles, focusing solely on survival needs without the complexity of emotions or rational thought.

The Limbic System and Emotional Drives

As humans evolved, the limbic system, or “mammal brain,” added layers of emotion and social behavior. The limbic system governs our hormonal responses, triggering feelings like fear, pleasure, and social connection. For example, the release of cortisol can signal stress, while dopamine contributes to feelings of satisfaction. This section of the brain is critical for forming bonds with others, making humans more social animals, much like dogs or other mammals.

The Neocortex and Advanced Cognition

The final layer, the neocortex, allows for advanced thinking and problem-solving. The neocortex supports complex abilities like language, math, and abstract thought. It’s what enables humans to plan for the future, imagine possibilities, and create art or technology. However, the neocortex also often conflicts with the more instinctual parts of our brain, leading to internal dilemmas where reason and emotion battle for control.

For a deeper look at the social implications of our brain structures, check out the article “evolution of AI consciousness.”

Conclusion

To uncover more about the fascinating three-brain theory and how it shapes our behavior, listen to the full episode with JJ Jerome on the EdgeHog Podcast.

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