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Ghin, F., O'Hare, L. 
ORCID: 0000-0003-0331-3646 and Pavan, A.,
2021.
Electrophysiological aftereffects of high-frequency transcranial random noise stimulation (hf-tRNS): an EEG investigation.
Experimental Brain Research, 239, pp. 2399-2418.
ISSN 0014-4819
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Abstract
There is evidence that high-frequency transcranial random noise stimulation (hf-tRNS) is effective in improving behavioural performance in several visual tasks. However, so far there has been limited research into the spatial and temporal characteristics of hf-tRNS-induced facilitatory effects. In the present study, electroencephalogram (EEG) was used to investigate the spatial and temporal dynamics of cortical activity modulated by offline hf-tRNS on performance on a motion direction discrimination task. We used EEG to measure the amplitude of motion-related VEPs over the parieto-occipital cortex, as well as oscillatory power spectral density (PSD) at rest. A time–frequency decomposition analysis was also performed to investigate the shift in event-related spectral perturbation (ERSP) in response to the motion stimuli between the pre- and post-stimulation period. The results showed that the accuracy of the motion direction discrimination task was not modulated by offline hf-tRNS. Although the motion task was able to elicit motion-dependent VEP components (P1, N2, and P2), none of them showed any significant change between pre- and post-stimulation. We also found a time-dependent increase of the PSD in alpha and beta bands regardless of the stimulation protocol. Finally, time–frequency analysis showed a modulation of ERSP power in the hf-tRNS condition for gamma activity when compared to pre-stimulation periods and Sham stimulation. Overall, these results show that offline hf-tRNS may induce moderate aftereffects in brain oscillatory activity.
| Item Type: | Journal article | ||||||
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| Publication Title: | Experimental Brain Research | ||||||
| Creators: | Ghin, F., O'Hare, L. and Pavan, A. | ||||||
| Publisher: | Springer (part of Springer Nature) | ||||||
| Date: | August 2021 | ||||||
| Volume: | 239 | ||||||
| ISSN: | 0014-4819 | ||||||
| Identifiers: |
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| Rights: | Post-prints are subject to Springer Nature re-use terms | ||||||
| Divisions: | Schools > School of Social Sciences | ||||||
| Record created by: | Laura Ward | ||||||
| Date Added: | 26 May 2021 09:38 | ||||||
| Last Modified: | 08 Jun 2022 03:00 | ||||||
| URI: | https://irep.ntu.ac.uk/id/eprint/42919 |
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