Migraine is a highly prevalent neurological disorder, affecting more than 10% of people (6% of men and 18% of women) worldwide. It is not surprising, therefore, that all three of the major neurotech device manufacturers, Medtronic, St. Jude Medical, and Boston Scientific, have evaluated their implantable stimulators for treatment of his chronic condition. Multiple areas have been targeted for treating migraine; with most common ones being the occipital nerves and the cerebral cortex. The latter approach is usually accomplished non-invasively with the transcranial magnetic stimulation and is most helpful for patients whose migraines begin with an aura, a condition characterized by flashing lights or other visual (or sometimes sensory, motor or verbal) disturbance. The occipital nerve stimulation is more generally applicable to migraine sufferers, and involves a chronic implantation of the stimulating device. The clinical trials have been performed to see whether any of the devices could clear at least one of two FDA-mandated thresholds: a 50% reduction in migraine severity or a 50% reduction in migraine frequency. Boston Scientific’s pivotal trial PRISM was completed in 2009, showing no significant improvements. Medronic’s pivotal trial ONSTIM was completed in 2010, indicating that 39% of patients achieved 50% reduction in migraine frequency. St. Jude Medical’s pivotal trial ended in June 2011 and was, perhaps, the most successful of the three: they reported an overall 28% reduction in migraine frequency and 42% reduction in migraine severity. Although these results are insufficient for the FDA clearance, the St. Jude Medical’s Genesis device was able to receive the European CE mark approval in September 2011. This gives the first-mover advantage to St. Jude Medical in Europe, but the battle for the lucrative US migraine market is still waging on.