ABSTRACT
Transcranial magnetic stimulation involves passing an electrical current through a coil placed against the scalp. The rapidly changing electrical current creates a time-varying magnetic eld, which passes unimpeded through the scalp and skull and induces an electrical eld in the cortex. This electrical eld changes neuronal activity at the site of stimulation and within inter-connected neuronal networks. Transcranial magnetic stimulation (TMS) pulses applied in a repetitive train is referred to as repetitive TMS (rTMS). Repetitive TMS can modulate cortical excitability in neural circuits under the coil.
