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February 8, 2026Scientific ReportsOpen Access

Somatosensory evoked potentials and high-frequency oscillations after transcranial static magnetic stimulation over the primary somatosensory cortex

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Randomized crossover study investigates tSMS effects on somatosensory potentials, suggesting selective modulation of thalamocortical input.

This research aims to determine if tSMS alters somatosensory evoked potentials and high-frequency oscillations in the primary somatosensory cortex.
Conducted a randomized crossover study with twenty healthy young adults.
Administered tSMS or sham stimulation over the left primary somatosensory cortex for 20 minutes.
Recorded somatosensory evoked potentials in response to right median nerve stimulation before, immediately after, and 20 minutes post-stimulation.
Extracted high-frequency oscillations using a 400–800 Hz band-pass filter from SEP waveforms.
tSMS significantly reduced the amplitude of early high-frequency oscillations 20 minutes after stimulation.
Late high-frequency oscillations showed no changes after tSMS.
The N20 component of standard somatosensory evoked potentials was unaffected by tSMS.

Tanaka et al. (2026) studied this question.

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Randomized crossover study investigates tSMS effects on somatosensory potentials, suggesting selective modulation of thalamocortical input.