Emma and Jennifer (IMAGE) McMaster University Caption Emma Waddington, lead author of the study, with Jennifer Heisz, Canada Research Chair in Brain Health and Aging at McMaster who supervised the research. Credit McMaster University Usage Restrictions None 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.