Try This The Ever-Changing Brain: Adapting, Aging, and Cognitive Health
19 snips
Oct 23, 2025 
In this engaging conversation, Richard Sima, a neuroscientist and journalist for The Washington Post, shares insights on aging and brain health. He discusses what defines a healthy brain and the fascinating adaptability of our neurons. Listeners learn about the differences between normal age-related memory lapses and dementia. Sima also highlights how our brains can remain functional despite shrinkage and emphasizes lifestyle choices that may reduce dementia risk. Tune in for a deep dive into the incredible workings of our ever-changing brains!
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What A Healthy Brain Looks Like
- A healthy brain has well-defined grooves, symmetry, and no signs of damage or chronic inflammation.
- These structural features support the brain's constant work of perceiving, remembering, reasoning, and imagining.
Brains Keep Rewiring With Use
- Brains keep changing because learning requires altering connections between neurons.
- Repeatedly activating neurons strengthens connections while unused ones get pruned.
Repetition Bakes Routes Into Memory
- Cristina uses the example of a daily commute being deeply wired into the brain from repetition.
- She contrasts that with a once-a-year drive, which the brain doesn't prioritize or strengthen as much.