Somewhere in between the fields of neurology and neurosurgery, we find physicians using less invasive techniques to perform procedures that could be classified as endovascular neurosurgery, or interventional neuroradiology, or more plainly, as neurology practiced through catheters. Dr. John Whapham, a neurointerventionalist and an assistant professor in the departments of neurology and neurological surgery at the Loyola University Chicago Stritch School of Medicine, explains how this area of practice has evolved in recent years, and previews what's in store for the future of this discipline, blending expertise across multiple specialties. Dr. Mark Nolan Hill hosts.