Peruvian family (IMAGE) Washington University School of Medicine Caption Merita (center) smiles at her great-granddaughter while her brother, Pablo, relaxes behind her. The family belongs to the Negritos community of Tumbes, a city in northern Peru. A study conducted in Peru and three other Latin American countries by researchers at Washington University School of Medicine in St. Louis reveals that racial disparities in brain health are due to social factors, with genetic ancestry playing no role. Credit ALEX KORNHUBER, GLOBAL ATLANTIC FELLOW FOR EQUITY IN BRAIN HEALTH AT THE GLOBAL BRAIN HEALTH INSTITUTE Usage Restrictions This image is to be used in accordance with the mission, policies and guidelines of Washington University in St. Louis. Visit https://wustl.edu/about/compliance-policies/media-policies/multimedia-use/ for more information. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.