Native Americans suffer from 'historical trauma,' researcher says Maria Yellow Horse Brave Heart describes the negative impact of historical trauma on Native Americans today. Maria Yellow Horse Brave Heart describes the negative impact of historical trauma on Native Americans today. Brave Heart is a research associate professor in the Graduate School of Social Work at the University of Denver. She spoke at the 2005 Native American Family Camp, held July 19-23 in Redlands, Calif., by the United Methodist Church’s Native American International Caucus. A Web-only photo by Edna Steinman. Photo #W05-093. Accompanies UMNS story #425. 7/27/05 July 27, 2005 By...