Dorothy and Levi Reeves have been married 57 years. Dorothy, 79, agreed to donate both of their brains for research. History of mistrust complicates study of dementia in African-Americans August 08, 2017 A history of racism in health care makes many African-Americans understandably wary. Mistrust thwarts efforts to understand dementia in black patients today, researchers say. via CNN Primary Category Health Tags Healthy Brain Aging Initiative