How your brain can rewire to fix itself

We used to think a brain's broken connections were irreparable. We now know that it can remarkably heal itself.

How do we keep our brains healthy? And what can we do to help strengthen crucial connections and keep our minds younger in the process?

In these four films, science journalist Melissa Hogenboom looks at the most cutting-edge scientific research and has her own brain scanned and analysed, with intriguing results.