Scientists discover a key to staying mentally sharp in old age

Scientists discover a key to staying mentally sharp in old age

(CNN) — People who have razor-sharp minds in their 80s and 90s — known as “SuperAgers” — produce twice the number of young neurons as cognitively healthy adults and 2.5 times as many as people with Alzheimer’s disease, a new study found. “This shows the aging brain has the capacity to regenerate — that’s huge,” said study coauthor Dr. Tamar Gefen, an associate professor of psychiatry and behavioral sciences at the Mesulam Institute for Cognitive…