How it fits together · lesson 1 of 10
Your brain is not fixed
Neuroplasticity means you can shape your brain at any age.
5 min read · reviewed October 2026
Wired to rewire
For decades people believed the adult brain was hardwired and only declined with age. We now know that's wrong: the brain rewires itself throughout life in response to how you use it. That's both a responsibility and an opportunity — the choices you make shape the brain you'll have.
Cognitive reserve
A lifetime of learning, challenge, and rich connections builds 'cognitive reserve' — a buffer that helps the brain keep functioning even as it ages. You build reserve by staying mentally and socially engaged.
Neuroplasticity — the brain's ability to form and reorganize connections — operates from infancy through old age. New neurons even form in the adult hippocampus, supported by exercise and learning.
Source: Adult neuroplasticity & neurogenesis research
What does neuroplasticity mean for your brain as an adult?
- It's fixed after childhood
- It keeps rewiring based on how you use it, at any age
- It only declines
- It only changes with medication
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B.It keeps rewiring based on how you use it, at any age
The adult brain continuously rewires in response to use, learning, and environment. That's why your habits and challenges genuinely shape your brain throughout life.