Migraine--Investigational Treatment of Migraine With Noninvasive Brain Stimulation. (tDCS- Migraine)

Subjects will receive a total of 10 sessions of either active tDCS or sham tDCS over a four-week period (administered every other day during weekdays over the course of one month). During each tDCS session, two electrodes are placed over selected areas of the brain. The anode is placed on the motor cortex contralateral to the side where migraines predominant; the cathode is placed near the supraorbital area, opposite the anode. A small battery powered device drives 2 mA of direct current through the two electrodes. The direct current will flow through the electrodes, penetrate the scalp, and create a flow of electrical current in the brain. The procedure will last 20 minutes. For sham tDCS, an alternate method of stimulation will be used.