23/01/2025
Why Outdated Neuroscience is Holding Us Back: 🧠 Rethinking the "Lizard Brain"
Ever heard someone talk about the "reptilian brain" controlling our instincts or explaining "fight or flight"? It's a popular idea, but it's actually outdated and not based on current science. I'll admit, I used to think the amygdala was our "lizard brain," so I've been a victim of this thinking too!
Here’s the deal:
• 🦎 The idea of a "triune brain" with a reptilian core is from the 1960s. It suggests our brains evolved in layers, like an onion, but this isn't how brain evolution works.
• Mammals didn't evolve from reptiles. Both share a common ancestor. Complex brains evolved independently in many different animals.
• Brains don't evolve in layers. All vertebrates have the same basic brain regions. Even reptiles, fish and birds have a cortex.
• The "reptilian brain" idea is often used to explain our response to threats, but that involves many brain areas, not just one. Also, our emotions are constructed by our brain, using ingredients like body sensations, our situation, and memories.
• Emotions aren't pre-programmed. We learn to understand and label them. This means we can expand our emotional vocabulary and take more control of our emotional experiences.
So, why does this matter? 🧐
• The "lizard brain" analogy suggests we're driven by fear and ignores the vast range of human emotions.
• It also suggests we're at the mercy of our instincts, removing our agency.
Instead of the "reptilian brain," let's use a more accurate understanding of neuroscience. Emotions are experiences we construct, shaped by multiple factors and our understanding of them.
Here are some alternative ways to think about our brains and emotions:
• Emotions are made up of your body sensations, life experiences, and your current situation.
• You actively create your emotions, rather than just reacting to the world.
• You can learn to identify emotions, like a skill.
Let’s move beyond outdated myths and embrace a more nuanced view of human behaviour.
Based on information from:
• Your Brain Is Not an Onion with a Tiny Reptile Inside by Joseph Cesario, David J. Johnson, and Heather L. Eisthen
• drsarahmckay.com