Repetitive transcranial magnetic stimulation (rTMS) is an emerging therapeutic option for a variety of neurologic and psychiatric disorders [1]. TMS is based on the principle of electromagnetic induction, in which an alternating electric current is passed through a stimulation coil, which is placed above the scalp. This stimulation coil serves as an electromagnet: by passing an alternating electric current through the coil, a time varying magnetic field is generated [2,3]. This varying magnetic field can penetrate soft tissue and bony structures such as the skull unimpededly and causes depolarization of neurons and leads to action potential.
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