Joel S. Perlmutter, MD, is the Elliot H. Stein Family Professor of Neurology and a researcher in the Neuroimaging Labs Research Center for Mallinckrodt Institute of Radiology at Washington University School of Medicine in St. Louis. He is the director of the American Parkinson Disease Association’s Advanced Research Center and the Huntington Disease Center of Excellence at Washington University. Perlmutter leads a research group that focuses on biomarker discovery and studies of the pathophysiology of Parkinson's disease, dystonia and related conditions. His research spans basic, translational and patient-oriented studies, and he has had continuous NIH funding for 37 years, publishing more than 350 peer-reviewed manuscripts.