Martin A. Samuels, MD, is the Founding Chair of the Department of Neurology at the Brigham and Women's Hospital and Professor of Neurology at Harvard Medical School in Boston, MA. He is board certified in both Internal Medicine and Neurology and his special interested is the interface between general medicine and neurology. Dr Samuels is the 2007 recipient of the H. Houston Merritt Award given by the American Academy of Neurology (AAN) for clinically relevant research and the 2006 recipient of the AB Baker Award for Lifetime Achievement in Neurologic Education. Allan H. Ropper, MD, is one of the most well-known and respected clinical neurologists in the world. He is a Raymond D. Adams Distinguished Clinician and is the founder of modern neurological intensive care and the former Chair of Neurology at Tufts University Medical School. He has been the Executive Vice Chair of the Department of Neurology at Brigham and Women's Hospital since 2007. He serves as the associate editor for neurology for the New England Journal of Medicine, principal author of Principles of Neurology, and is the co-author of four editions of Adams and Victor's Principles of Neurology.