Author: Simon Keller, Professor of Neuroimaging, Pharmacology & Therapeutics, University of Liverpool

An MRI scan can show changes in the brain's structure, but the findings don't always explain a person's symptoms. Gorodenkoff/Shutterstock In 2007, researchers in the Netherlands scanned the brains of 2,000 people aged 45 and over who were going about their ordinary lives. Seven in every 100 had signs of a stroke they never knew […]