[15a-P1-1~4] 1.1 Interdisciplinary and General Physics

[15a-P1-3] Effects of the heat loss caused by the induced current by using Transcranial magnetic stimulation (TMS)

〇(PC)Toshiaki Kaminaka^1,2, Osamu Yokoi^1,2, Katsuhiko Hata^1,2 (1.Res.Cent.for.Math.Med, 2.DPEMS)

Keywords:Transcranial magnetic stimulation, neurophysiology

Transcranial magnetic stimulation (TMS) is one of a neurophysiologic technique that allows for noninvasive and painless stimulation of the human cortex based on the principle of electromagnetic induction. TMS is able to modify neuronal activity locally and at distant sites. TMS can be applied as continuous trains of low frequency (1 Hz or less) or bursts of higher frequency ($\geq 1$ Hz). In general, low-frequency rTMS is thought to reduce excitability in the targeted cortical region, while high-frequency rTMS is thought to enhance excitability. Since the induced current generated by TMS is usually a rectangular wave, it contains various frequency components, but it is considered that the high frequency components are converted to heat. Currently, we are analyzing this heat loss estimate and its influence.