Researchers See Decline in Dementia, Offering Optimism

Aired: 7/17/2013 | 0:06:54 | Clip
Two European studies show a significant decline in dementia and severe memory loss among healthier and better educated populations. Can successive generations continue to encourage this downward trend? Gwen Ifill talks to Dr. Murali Doraiswamy, a practicing physician and professor at Duke University School of Medicine.