Visual Diagram (IMAGE) Iowa State University Caption Results from a study conducted by Assistant Professor Auriel Willette and his research team suggest immune cells may link body composition to how cognition changes as we age. Credit Auriel Willette, Iowa State University 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.