Shannon Risacher, Indiana University (IMAGE) Indiana University Caption Research by Shannon Risacher, Ph.D., of Indiana University School of Medicine, and colleagues indicates that the best-known genetic variant linked to Alzheimer's disease may be 'at work' promoting deposits of plaque in the brain long before any symptoms of the disease can be measured on tests. Credit Indiana University School of Medicine Usage Restrictions None License Licensed 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.