Building mental muscles
Go Deeper.
Create an account or log in to save stories.
Like this?
Thanks for liking this story! We have added it to a list of your favorite stories.

The scan on the left shows a healthy brain. The one on the right shows the damage caused by Alzheimer's disease.
Image courtesy of the National Institute on Aging
Gallery
Turn Up Your Support
MPR News helps you turn down the noise and build shared understanding. Turn up your support for this public resource and keep trusted journalism accessible to all.