Dr. Daniel Claassen (IMAGE) Vanderbilt University Medical Center Caption Daniel Claassen, MD, MS, chief of the Division of Cognitive Disorders and associate professor of Neurology at Vanderbilt University Medical Center. Credit Vanderbilt University Medical Center Usage Restrictions Vanderbilt University Medical Center 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.