Roughly one in every five patients referred to a neurologist suffers from headaches; the majority have migraines. Although headache specialists understand migraine on a clinical basis, the pathophysiological changes that provoke and accompany the development of a migraine attack continue to elude us.  Several decades have passed since the pioneering electroencephalographic study by Golla and Winter (1959), which underscored the role of abnormal rhythmic activities in migraine. Since then, there have been substantial advances in the field; a wealth of neurophysiological studies has enriched our understanding of the pathophysiological facets of the migraine pathology. Virtually every known technique of clinical electrophysiology has since been used to study the migraine brain and, more recently, new neurophysiological tools have been added to the arsenal.