NeuroStar TMS stands for “Transcranial Magnetic Stimulation.” TMS is a medical procedure that works by delivering highly focused MRI-strength magnetic pulses to noninvasively (without surgery) stimulate the brain and treat major depression. This magnetic field stimulate the neurons and show depression symptom relief. Patients being treated with TMS do not require anesthesia or sedation. They remain awake and alert and return to work or their daily routine immediately after each treatment.