Transcranial magnetic stimulation (TMS) is a noninvasive procedure that uses magnetic fields to stimulate nerve cells in the brain to improve symptoms of major depression, OCD, migraines, and to help people stop smoking after other treatments have not been successful. TMS devices operate completely outside of the body and affect central nervous system activity by applying powerful magnetic fields to specific areas of the brain that are involved in depression. During TMS, a magnetic coil is placed against the scalp, and the coil delivers magnetic pulses that stimulate nerve cells in the region of the brain involved in mood control and depression. Its thought to activate regions of the brain that have decreased activity during depression. TMS is a noninvasive treatment that doesnt require anesthesia and is generally exceptionally well tolerated as compared to the side effects often seen with medications and electroconvulsive therapy (ECT) . TMS therapy is an intensive treatment option requiring sessions that occur five days a week for several weeks. Each session may last anywhere from 20 to 50 minutes, depending on the device and clinical protocol being used. TMS is being studied extensively across disorders and even disciplines with the hope that it will evolve into new treatments for neurological disorders, pain management, and physical rehabilitation in addition to psychiatry.