Memory declines as we age, but most people will never experience the severe neuronal loss of dementia. “The Aging, Demographics and Memory Study” on the prevalence of dementia concluded that 13.9 percent of the U.S. population over the age of 71 has some form of dementia, with Alzheimer’s disease accounting for just less than 10 percent, says brain researcher Carol Barnes. “That means 86 percent of us age normally.” The likelihood of dementia increase as people age, hitting 1 in 3 by age 85. Barnes, director of the University of Arizona’s Mc-Knight Brain Institute, has studied the aging brain for […]