A new study suggests concussions may speed up mental decline among individuals already at risk for Alzheimer’s disease. In this study, researchers examined 160 veterans of the Iraq and Afghanistan wars and found that concussions seemed to accelerate Alzheimer’s disease-related brain deterioration and mental decline in the veterans at genetic risk for the disease. Dr. Jasmeet Hayes, an assistant professor of psychiatry at Boston University School of Medicine writes, “Our results suggest that when combined with genetic factors, concussions may be associated with accelerated cortical thickness and memory decline in Alzheimer’s disease-relevant areas.” Brain, January 2017