Vanderbilt University Medical Center

Vanderbilt University Medical Center

Contact Information

  Vanderbilt University Medical Center
Medical Center East
North Tower, 8th Floor
1215 21st Avenue South
Nashville, TN 37232

Danielle Buchanan (615) 875-3274



Site Coordinators

Danielle Buchanan



Site Investigators

Daniel Claassen, MD

Dr. Daniel Claassen is an Assistant Professor of Neurology at Vanderbilt University and a neurologist specializing in the care of patients with neurodegenerative disorders, with particular interest in patients with cognitive dysfunction and movement disorders. He earned his medical degree from the Medical College of Georgia and completed his Neurology residency training at the Mayo Clinic, in Rochester, MN and postdoctoral training at the University of Virginia, in Charlottesville, VA. He is a past recipient of the American Academy of Neurology clinical research training grant. Dr. Claassen’s research focuses on understanding brain-behavior relationships in the context of the diagnosis and treatment of neurodegenerative diseases.

Since 2009, he has focused his research efforts on behavioral studies in neurodegenerative disorders, evaluating the influence of medications on behavior and cognition. His current studies address cognitive changes that account for impulsive compulsive behaviors. Furthermore, he maintains an active clinical and research interest in the utility of functional neuroimaging. Clinically, his expertise in FDG PET quantitation enables improved recognition and diagnostic certainty of neurodegenerative disorders, such as Alzheimer’s disease.


Katherine McDonell, MD

Dr. Katherine McDonell is an Assistant Professor of Neurology at Vanderbilt University specializing in Cognitive Neurology with a focus in Movement Disorders. She earned her medical degree at Northwestern University and completed her residency training in Neurology at Beth Israel Deaconess Medical Center in Boston, MA. She completed a fellowship in Cognitive Neurology at Vanderbilt and subsequently joined the neurology faculty. She is an active member of the Huntington’s Disease Clinic and participates in clinical care as well as research and teaching. She is currently involved in several clinical trials in HD and has also been awarded an American Academy of Neurology clinical research training fellowship to support her work understanding the cognitive and behavioral changes associated with Parkinson’s disease.