Karen S. Marder, MD, MPH, completed medical school at Weill Cornell Medical College and neurology residency at Columbia University Medical Center. She has served as the chief of the Division of Aging and Dementia since 2001 and directs the United Council for Neurologic Subspecialties fellowship in behavioral neurology and neuropsychiatry. She also serves as associate director of the Irving Institute for Clinical and Translational Research (CTSA). Her research interests span a range of neurodegenerative diseases including Parkinson’s disease, dementia with Lewy bodies, Huntington’s disease, HIV dementia, and Alzheimer’s disease and related disorders. She is the principal investigator for an NIH-funded study of the epidemiology and genetics of early-onset Parkinson’s disease. A major research focus has been the risk factors and impact of cognitive impairment on the course of Parkinson’s disease. She served as co-chair of the executive committee of the Parkinson Study Group (2006-2012). Currently, she is the Columbia co-PI of NeuroNEXT and a member of the executive committee. She is founder (1991) and director of the Huntington’s Disease Center of Excellence at Columbia.