"Use It or Lose It," New Alzheimer's Research Concludes.

When it comes to memory, there might just be something to the old adage "use it or lose it."

In the … issue of the Journal of the American Medical Association, researchers provide further evidence that people who participate more frequently in cerebrally challenging activities have a lower risk of developing Alzheimer's.*

http://www.sciam.com/article.cfm?articleID=000932BC-E871-1CCE-B4A8809EC588EEDF&sc=I100478

*The author subscribes to Scientific American