How does TMS work?
Basically, a TMS device allows a trained physician to use an electromagnet to noninvasively stimulate the brain of a patient. A rapidly changing magnetic field created by a magnetic coil causes weak electric currents in the brain through electromagnetic induction. By stimulating different areas of the cortex, it is possible to elicit a therapeutic response. For example, studies have shown that applying stimulation to the left prefrontal cortex increases activity below the stimulation site and produces a statistically significant reduction in depressive symptoms. TMS can currently target sites in the brain to within a few millimeters.
