You may have heard of TMS or transcranial magnetic stimulation, a non-invasive form of therapy that transmits electromagnetic impulses to targeted regions of the brain. The practice of using electric current therapeutically has been around for centuries. According to PBS, “electric eels and fish were used by people in ancient times to treat headaches and mental illness.” Most commonly, TMS therapy has been used to treat those that have been non-responsive to more traditional antidepressant treatment. The method is a relatively new one, which was approved by the Food and Drug Administration in 2008. As with most new medical discoveries, it has been the subject of several studies to test its effectiveness.