Effect of Transcranial Static Magnetic Field Stimulation Over the Sensorimotor Cortex on Somatosensory Evoked Potentials in Humans

Kirimoto, Hikari; Tamaki, Hiroyuki; Matsumoto, Takuya; Sugawara, Kazuhiro; Suzuki, Makoto; Oyama, Masanobu; Onishi, Hideaki

doi:10.1016/j.brs.2014.09.016

Cited by 53 publications

(73 citation statements)

References 46 publications

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“…During the experiment, the subject sat in a chair with a backrest with the right forearm fixed to a metal frame to prevent unwanted movements from occurring following TMS. To deliver the tSMS to the cerebellar hemisphere, the center of the cylindrical magnet was placed 1 cm below and 3 cm to the right of the inion using a stand with a clip for 15 min, because it was previously reported that the effect obtained with tSMS lasted for 10 min or more (Oliviero et al, 2011;Kirimoto et al, 2014;Nojima et al, 2015). The south pole was used in the same way as in previous research (Oliviero et al, 2011) because the effect does not depend on the polarity of the magnet (Oliviero et al, 2011;Kirimoto et al, 2014).…”

Section: Experiments 1: Effect Of Tsms On the Rmt Of Mepsmentioning

confidence: 99%

“…To deliver tSMS to the cerebellum, a cylindrical nickelplated NdFeB magnet was used (Kirimoto et al, 2014;Nojima et al, 2015). The magnet was 50 mm in diameter and 30 mm thick, and its surface magnetic flux density was approximately 5340 G (Model N-50, NeoMag, Chiba, Japan).…”

Section: Tsmsmentioning

confidence: 99%

“…To deliver the tSMS to the cerebellar hemisphere, the center of the cylindrical magnet was placed 1 cm below and 3 cm to the right of the inion using a stand with a clip for 15 min, because it was previously reported that the effect obtained with tSMS lasted for 10 min or more (Oliviero et al, 2011;Kirimoto et al, 2014;Nojima et al, 2015). The south pole was used in the same way as in previous research (Oliviero et al, 2011) because the effect does not depend on the polarity of the magnet (Oliviero et al, 2011;Kirimoto et al, 2014). To estimate the effect, on the excitability of the left motor cortex, of delivering the tSMS and sham stimulation over the right cerebellum, the rMT of the right FDI muscle was evaluated at the following times: pre stimulation (pre), immediately after stimulation (post), 5 min after stimulation (post5), and 10 min after stimulation (post10).…”

Section: Experiments 1: Effect Of Tsms On the Rmt Of Mepsmentioning

confidence: 99%

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Cerebellar transcranial static magnetic field stimulation transiently reduces cerebellar brain inhibition

Matsugi¹,

Okada²

2017

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SummaryThe aim of this study was to investigate whether transcranial static magnetic field stimulation (tSMS) delivered using a compact cylindrical NdFeB magnet over the cerebellum modulates the excitability of the cerebellum and contralateral primary motor cortex, as measured using cerebellar brain inhibition (CBI), motor evoked potentials (MEPs), and resting motor threshold (rMT). These parameters were measured before tSMS or sham stimulation and immediately, 5 minutes and 10 minutes after stimulation. There were no significant changes in CBI, MEPs or rMT over time in the sham stimulation condition, and no changes in MEPs or rMT in the tSMS condition. However, CBI was significantly decreased immediately after tSMS as compared to that before and 5 minutes after tSMS. Our results suggest that tSMS delivered to the cerebellar hemisphere transiently reduces cerebellar inhibitory output but does not affect the excitability of the contralateral motor cortex.

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Section: Experiments 1: Effect Of Tsms On the Rmt Of Mepsmentioning

confidence: 99%

Section: Tsmsmentioning

confidence: 99%

Section: Experiments 1: Effect Of Tsms On the Rmt Of Mepsmentioning

confidence: 99%

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Cerebellar transcranial static magnetic field stimulation transiently reduces cerebellar brain inhibition

Matsugi¹,

Okada²

2017

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“…Our results suggest that different components of SEPs are reduced according to the tSMS stimulation site. As shown previously, tSMS over C3 modulates the N20 component of SEPs 6) , while the amplitude of N33 is affected by tSMS over M1 37) . This result showing that tSMS over M1 can reduce the N33 component of SEPs at C3' is consistent with lowfrequency repeated TMS 35) and cathodal tDCS 38) studies.…”

Section: Modulation Of Seps By the Application Of Tsms Over The Primamentioning

confidence: 82%

“…In recent tSMS over M1 studies, Silbert et al showed that tSMS could reduce M1 excitability correlating to modulation of resting motor threshold of TMS 4) , while Nojima et al demonstrated enhanced short latency intracortical inhibition (SICI) 5) . In addition, we have previously reported that SMFs over the sensorimotor cortex (C3 of the international 10-20 system of electrode placement) reduced the amplitudes of the N20 component of somatosensory evoked potentials (SEPs) 6) . Moreover, tSMS over the visual cortex increases alpha oscillations and slows visual search abilities 7) .…”

Section: Introductionmentioning

confidence: 99%

Transcranial static magnetic field stimulation - new non-invasive brain stimulation tool

Kirimoto

Tamaki

Onishi

2016

JPFSM

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Recent research has shown that the human motor cortex can be modulated by the application of static magnetic fields through the scalp. Transcranial static magnetic field stimulation (tSMS) has since received significant attention as a new non-invasive brain stimulation (NIBS) technique alongside conventional methods, such as repetitive transcranial magnetic stimulation and transcranial direct current stimulation. The advantages of the strong neodymium, iron and boron (NdFeB) magnet used in tSMS over other NIBS methods include the ease of use, absence of uncomfortable sensations for subjects, a lack of necessity for high operational skills and expensive devices, and conclusive sham stimulation allowing for controlled experiments and randomized controlled clinical trials. Hence, tSMS may be a new potential NIBS tool to modulate cerebral excitability.

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Static magnetic stimulation in the central nervous system: a systematic review

et al. 2021

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Objective To systematically review the literature on the use of the transcranial static magnetic stimulation (tSMS) technique in humans and animals, its effects on different areas of the central nervous system (CNS), its influence on neural excitability and on the subject's behavior, and its biological effects and future possibilities. All static magnetic field applications that can be considered to have a physiologically similar effect have been reviewed. Methods We searched studies using key terms in NCBI PubMed, Scopus, PEDro, SciELO, Cochrane, and links to publications (inception to September 2019). Three reviewers independently selected the studies, extracted data, and assessed the methodological quality of the studies using the recommendations described in the Cochrane Handbook for Systematic Reviews of Interventions, PRISMA guidelines. ResultsWe analyzed 27 studies. The reviewed literature suggests that the use of these magnetic fields has an inhibitory effect on different areas of the CNS, such as motor, somatosensory, and visual cortex, cerebellum, and spinal cord. Regarding subject's behavior, the different effects of tSMS appear to be transient and dependent on the stimulated area, such as loss of visual discrimination or improvement of somatosensory perception. In addition, the technique has some therapeutic utility, specifically in pathologies with cortical hyperexcitability. Conclusions These results suggest that tSMS may be a promising tool to modulate cerebral excitability in a safe and non-invasive way. Further investigations could give a better explanation of its precise mechanisms of action and applications.

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Effect of Transcranial Static Magnetic Field Stimulation Over the Sensorimotor Cortex on Somatosensory Evoked Potentials in Humans

Cited by 53 publications

References 46 publications

Cerebellar transcranial static magnetic field stimulation transiently reduces cerebellar brain inhibition

Cerebellar transcranial static magnetic field stimulation transiently reduces cerebellar brain inhibition

Transcranial static magnetic field stimulation - new non-invasive brain stimulation tool

Static magnetic stimulation in the central nervous system: a systematic review

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