[Simnibs-discuss] what is essence of TMS. Or TMS mechanism
axelt at drcmr.dk
Tue Mar 23 09:59:38 CET 2021
the explanation by Pascual-Leone you give at the end of your email is
correct. However, the frequency of a single TMS pulse is ~ 3 to 7 kHz,
which is high enough to induce currents that are strong enough to
depolarize the membranes.
The 1-25 Hz refer to the frequency at which TMS pulses are then repeated
to get neuromodulatory effects
On 3/23/2021 1:25 AM, 刘习杰 wrote:
> Dear friends,
> If you are familiar with it， please answer.
> Recently, I am studying the comparison between Transcranial Magnetic
> Stimulation (TMS) and tDCS. The essence of TMS is the magnetic
> modulation, is it right? Or is the essence of TMS the promotion of
> blood flow by a magnetic field? So, like the magnetic field in MRI,
> the magnetic field force rotatations of all electrons in the same
> Or does TMS work by inducting electric fields and currents? But the
> frequency of TMS is only 1-25 Hz.
> There's an explanation, saying TMS is delivered to the brain by
> passing a strong brief electrical current through an insulated wire
> coil placed on the skull. This rapid phasic current flow generates a
> transient magnetic field, which propagates in space and in turn
> induces a secondary current in the brain that is capable of
> depolarising neurons if the coil is held over the subject’s head
> (Pascual-Leone et al., 2002).
> Thanks and Bests,
> Simnibs-discuss mailing list
> Simnibs-discuss at drcmr.dk
Dr. Axel Thielscher
Danish Research Center for Magnetic Resonance
Copenhagen University Hospital Hvidovre
DK-2650 Hvidovre, Denmark
Department of Health Technology
Technical University of Denmark
DK-2800 Kgs. Lyngby
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