PHYSICS

Introduction

Transcranial Magnetic Stimulation (TMS) is a non-invasive, focal stimulation of the brain by using changing magnetic field to induce electrical current in the brain tissue, according to Faraday's Law of Electromagnetic Induction. 

TMS make use of electromagnetic induction to generate electric current across the scalp and skull layers of the human head. When the TMS coil of wire which carry the pulsate electrical current generated from the TMS device, it induce a changing magnetic field, hence induce an invert electrical field and current in the brain tissue. The electrical current then depolarize or hyperpolarize the targeted neurons.

According to the Biot-Savart Law,

the magnetic field of an unit of current element is generate from the above equation. Changing the current from a generator results in generating a pulsed magnetic field, which then induction and inverse electric current in neurons according to the Faraday's Law and Maxwell's Equation,

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