This is not Alzheimer's disease, but the wear-and-tear of so-called normal aging. New research is making clear that memory and other brain functions decline to varying degrees even in otherwise healthy people as they age, as anyone who habitually loses car keys probably suspected.
By Lauran Neergaard, Associated Press
Full Story: http://www.usatoday.com/tech/science/discoveries/2007-10-16-aging-brain-studies_N.htm