How TMS Works for Treatment-Resistant Depression
What Is TMS Therapy?
Transcranial Magnetic Stimulation (TMS) is a non-invasive brain stimulation treatment that uses magnetic pulses to activate areas of the brain associated with mood regulation. It is FDA-approved for the treatment of major depressive disorder, particularly in individuals who have not responded to antidepressant medications.
How Does TMS Work?
During a TMS session, a magnetic coil is placed against the scalp near the forehead. The coil delivers repetitive magnetic pulses that stimulate nerve cells in the prefrontal cortex — the region of the brain involved in mood and decision-making. Sessions typically last 20 to 40 minutes and are performed five days a week for four to six weeks.
Who Is a Good Candidate?
TMS is most appropriate for adults with treatment-resistant depression — meaning depression that has not improved after trying at least two antidepressant medications at adequate doses. It may also be considered for patients who cannot tolerate medication side effects.
What to Expect
TMS is an outpatient procedure requiring no anesthesia or sedation. Patients remain awake and alert during treatment and can drive themselves home afterward. The most common side effect is mild scalp discomfort or headache during the first few sessions, which typically resolves quickly.
Effectiveness
Clinical studies show that approximately 50 to 60 percent of people with treatment-resistant depression experience a meaningful reduction in symptoms with TMS, and about one-third achieve full remission.
