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It's one of the most exciting frontiers in neuroscience and psychology: the gut-brain axis. In this episode, Dr. Roger Hall explains why the gut is increasingly referred to as "the second brain" and details the profound impact our gut microbiome has on our mental and physical health.
Dr. Hall discusses the Enteric Nervous System, a separate and autonomous network of nerves in our gut that communicates directly with our brain via the vagus nerve. He explains that humans are symbiotic organisms, hosting more bacterial cells than human cells, and that these bacteria play a crucial role in everything from digestion to serotonin production. The conversation covers how diet shapes this internal ecosystem and how changing our gut biome can lead to changes in mood, weight, and even core personality traits
In This Episode, You Will Learn:
- The function of the Enteric Nervous System and its role as our "second brain."
- How the vagus nerve creates a direct communication superhighway from the gut to the brain, with 90% of signals flowing upstream.
- The critical role of gut bacteria in digestion and the production of key neurotransmitters like serotonin.
- The difference between probiotics (beneficial bacteria) and prebiotics (food for the bacteria).
- How our initial gut biome is inherited from our mothers at birth, creating a link to our ancestral and cultural diets.
Resources Mentioned:
- Enteric Nervous System
- Vagus Nerve & The Gut-Brain Axis
- Gut Biome / Microbiome
- Probiotics & Prebiotics
- Fecal Transplants
Thank you for tuning in to this episode of Second Thoughts with Dr. Roger Hall!
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Chapters
1. Introduction: The Gut as the Second Brain (00:00:00)
2. The Gut-Brain Connection via the Vagus Nerve (00:02:52)
3. The Symbiotic Relationship: Understanding the Gut Microbiome (00:05:00)
4. The War in Your Gut and How Diet Influences It (00:07:15)
5. Case Studies: How Changing the Gut Biome Changes Personality and Health (00:10:48)
6. The Generational Transfer of the Gut Biome (00:13:46)
7. Practical Nutrition: Probiotics and Prebiotics (00:17:00)
8. Experimenting With Your Diet to Improve Your Mood (00:20:11)
37 episodes
