Christopher M. Loftus, MD, Dr.h.c., FACS, is Professor and Chairman, Department of Neurosurgery, and Professor of Neurology at Loyola University Stritch School of Medicine, Maywood, IL, USA. His previous appointments include Professor and Chairman, Department of Neurosurgery, Temple University School of Medicine, Philadelphia, PA; The Harry Wilkins Professor and Chairman and The Esther and Ted Greenberg Professor and Chairman, Department of Neurosurgery, The University of Oklahoma Health Sciences Center, Oklahoma City, OK; and Professor of Surgery (Neurosurgery), The University of Iowa College of Medicine, Iowa City, IA. Dr. Loftus is a Diplomate of the National Board of Medical Examiners and the American Board of Neurological Surgery. He has held many offices in leading professional bodies, including Vice Presidency of the American Association of Neurological Surgeons, and he is currently Treasurer of the World Federation of Neurosurgical Societies. His research interests include intracranial collateral circulation, extracranial carotid occlusive disease, and responses of cerebral blood flow to cerebral revascularization. He is participating in the IHAST cooperative trial for hypothermia in aneurysm surgery and the ISUIA — unruptured aneurysm trial. Dr. Loftus has been a member of the editorial boards of many prestigious journals and is the author of more than 200 articles and book chapters in peer-reviewed publications. He has edited or authored over twenty previous books, including, most recently, Intraoperative Neuromonitoring (Mc Graw-Hill, New York, 2013; co-editors Biller J and Baron EF).