Chronic migraine is a severely disabling condition that is poorly recognized and undertreated by clinicians. Much debate has existed over the nomenclature and diagnostic criteria for this condition and, until 2007, there had been a paucity of clinical trial data for preventive therapies. In this Review, Diener and colleagues discuss the evolution of terminology and definitions used for chronic migraine, as well as the epidemiology, pathophysiology and treatment of this condition.
- Hans-Christoph Diener
- David W. Dodick
- Stephen D. Silberstein