The sources of migraine headaches have long been a mystery in medicine. Over the years, many theories have come and gone, with few enduring leads on this debilitating problem that affects many of our patients. Could finding a new therapy for migraines bring us back to the root cause of this condition? Dr. Joel Saper, director of the Michigan Head Pain and Neurological Institute in Ann Arbor, discusses his clinical research on occipital nerve stimulation as treatment for migraine headaches with host Dr. Mark Nolan Hill.