 During the visit, Dr. Devi will locate the area of the brain to be stimulated and mark that area of the scalp with an indelible skin marker that will wash out over time. In addition, the subjects will be provided with ear plugs to use during stimulation. This process of locating the area to be stimulated will take about an hour and will occur once. Then rTMS will be started and this procedure will take approximately 20-30 minutes please see the full protocol for a complete description of this process. 