RecruitingDevice studyInvestigation and Modulation of the Central Mu-Opioid Mechanism in Migraine (in Vivo)This study investigates whether unilateral and bilateral non-invasive brain stimulation, given for 20 minutes/once per day for twenty days (M-F) can reduce migraine pain. Fourty patients will receive treatment (20 unilateral treatment, and 20 bilateral treatment), while twenty will receive a "sham" procedure. Another 20 Episodic Migraine patients will be recruited for the observational aim of the study which does not include brain stimulation.