We are one of very few TMS centers in Arizona where the physician specifically performs the mapping procedure. During this session, the physician will take measurements of your head, perform the mapping, and determine the motor threshold. Mapping involves finding the specific target of stimulation, which is then mapped and marked on a cap that you wear for each treatment session. Next, the motor threshold determination is performed by pinpointing the minimum magnetic energy needed to stimulate your brain. This is performed by stimulating the left side of the brain over the area that controls your right hand. The stimulation will cause your right hand / finger / thumb to twitch. Now, the physician can determine the amount of stimulation to use in your case during the treatment sessions.