The Studies Show Episode 74: Neurogenesis
May 28, 2025
Can adults really grow new neurons? This lively discussion tackles the controversies surrounding adult neurogenesis, debating whether our brain cells are fixed after childhood. Insights from London taxi drivers highlight the brain's adaptability amid learning challenges. The podcast humorously critiques research methodologies while exploring the implications of exercise on neuron growth and mental health. Revelations about DNA replication and nuclear impacts add depth to the conversation, creating a rich tapestry of scientific inquiry.
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Hippocampus Growth Controversy
- The hippocampus may grow structurally with experience, similar to muscle growth from weightlifting.
- This phenomenon, if due to neurogenesis, remains scientifically controversial with no clear consensus.
Hippocampal Size Causes
- Larger hippocampus in taxi drivers could be due to neurogenesis, cell size increase, or more connections.
- Brain volume changes can result from factors other than new neurons, complicating interpretations.
Using Nuclear Carbon-14 to Date Neurons
- Carbon-14 from nuclear tests allows dating of neuron birth in humans by measuring DNA.
- This method cleverly indicates when neurons were formed, comparing to atmospheric carbon-14 levels.