Treatment for Migraines With an Implantable Device

Key Inclusion Criteria: * Be diagnosed with multiple migraines per month of moderate to severe intensity; * Be refractory to medication; * Be an appropriate candidate for the surgical procedures required for this study; * Be willing and able to comply with all study related procedures; * Be capable of reading and understanding patient information materials and giving written informed consent. Key Exclusion Criteria: * Have onset of migraine after age 50; * Have a significant psychiatric disorder; * Have previously been treated with occipital nerve stimulation; * Have had an injection of botulinum toxin in the head or neck within 6 months prior to enrollment; * Have previously undergone destructive ganglionectomy affecting C2/C3 occipital and/or trigeminal distribution or have an occipital blockade or radio frequency procedure currently in effect; * Have a condition currently requiring or likely to require the use of MRI or diathermy; * Have an active implantable device; * Have participated in any drug or device trial in the last 4 weeks or plan to participate in any other study.