A model for removing transcranial current stimulation artifacts in concurrently measured EEG

Marghi, Yeganeh M.; Rampersad, Sumientra; Salehi, Seyed Sadegh Mohseni; Dannhauer, Moritz; Brooks, Dana H.; Pavel, Misha; Erdoğmuş, Deni̇z

doi:10.1109/spmb.2015.7405457

Cited by 2 publications

(5 citation statements)

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“…Finally, some stimulation artifacts may still have been present in the EEG data acquired during tDCS despite cleaning efforts, thereby obscuring the effects of stimulation (Boonstra, Nikolin, Meisener, Martin, & Loo, 2016). Although simple temporal and spatial filtering strategies may attenuate some tDCS-induced noise (Mancini et al, 2015;Marghi et al, 2015), they appear to be insufficient to eradicate all inherent and non-inherent physiological and stimulator artifacts. These pose a unique nonstationary problem that can only be removed with significant effort (Gebodh et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…The above measures were also analyzed during tDCS except for frontal theta, which showed strong signs of contamination from the stimulation artifact. Previous studies have suggested that a high-pass filter is sufficient to generate clean concurrent EEG data during stimulation (Mancini et al, 2015;Marghi et al, 2015), and the on-line effects of tDCS on EEG activity can be successfully acquired (Giovannella et al, 2018;Soekadar, Witkowski, Garcia Cossio, Birbaumer, & Cohen, 2014;Schestatsky, Morales-Quezada, & Fregni, 2013). Therefore, EEG analyses during tDCS were restricted to alpha frequency bands and higher, effectively adopting a high-pass filter of 8 Hz.…”

Section: During Tdcsmentioning

confidence: 99%

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Transcranial Direct Current Stimulation Modulates Working Memory Maintenance Processes in Healthy Individuals

Nikolin

Martin

Loo

et al. 2023

Journal of Cognitive Neuroscience

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Background: The effects of transcranial direct current stimulation (tDCS) at the pFC are often investigated using cognitive paradigms, particularly working memory tasks. However, the neural basis for the neuromodulatory cognitive effects of tDCS, including which subprocesses are affected by stimulation, is not completely understood. Aims: We investigated the effects of tDCS on working memory task-related spectral activity during and after tDCS to gain better insights into the neurophysiological changes associated with stimulation. Methods: We reanalyzed data from 100 healthy participants grouped by allocation to receive either sham (0 mA, 0.016 mA, and 0.034 mA) or active (1 mA or 2 mA) stimulation during a 3-back task. EEG data were used to analyze event-related spectral power in frequency bands associated with working memory performance. Results: Frontal theta event-related synchronization (ERS) was significantly reduced post-tDCS in the active group. Participants receiving active tDCS had slower RTs following tDCS compared with sham, suggesting interference with practice effects associated with task repetition. Theta ERS was not significantly correlated with RTs or accuracy. Conclusions: tDCS reduced frontal theta ERS poststimulation, suggesting a selective disruption to working memory cognitive control and maintenance processes. These findings suggest that tDCS selectively affects specific subprocesses during working memory, which may explain heterogenous behavioral effects.

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Section: Discussionmentioning

confidence: 99%

Section: During Tdcsmentioning

confidence: 99%

Transcranial Direct Current Stimulation Modulates Working Memory Maintenance Processes in Healthy Individuals

Nikolin

Martin

Loo

et al. 2023

Journal of Cognitive Neuroscience

View full text Add to dashboard Cite

show abstract

“…Although simple temporal and spatial filtering strategies may attenuate some tDCS-induced noise (Mancini et al, 2015;Marghi et al, 2015), they appear to be insufficient to eradicate all inherent and non-inherent physiological and stimulator artefacts. These pose a unique non-stationary problem that can only be removed with significant effort (Gebodh et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…Finally, some stimulation artefacts may still have been present in the EEG data acquired during tDCS despite cleaning efforts, thereby obscuring the effects of stimulation (Boonstra, Nikolin, Meisener, Martin, & Loo, 2016). Although simple temporal and spatial filtering strategies may attenuate some tDCS-induced noise (Mancini et al, 2015; Marghi et al, 2015), they appear to be insufficient to eradicate all inherent and non-inherent physiological and stimulator artefacts. These pose a unique non-stationary problem that can only be removed with significant effort (Gebodh et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

“…The above measures were also analysed during tDCS except for frontal theta, which showed strong signs of contamination from the stimulation artefact. Previous studies have suggested that a high-pass filter is sufficient to generate clean concurrent EEG data during stimulation (Mancini et al, 2015; Marghi et al, 2015), and the online effects of tDCS on EEG activity can be successfully acquired (Giovannella et al, 2018; Schestatsky, Morales-Quezada, & Fregni, 2013; Soekadar, Witkowski, Garcia Cossio, Birbaumer, & Cohen, 2014). Therefore, EEG analyses during tDCS were restricted to alpha frequency bands and higher, effectively adopting a high-pass filter of 8Hz.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

TDCS Modulates Working Memory Maintenance Processes in Healthy Individuals

Nikolin

Martin

Loo

et al. 2022

Preprint

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Background: The effects of tDCS at the prefrontal cortex are often investigated using cognitive paradigms, particularly working memory tasks. However, the neural basis for the neuromodulatory cognitive effects of tDCS, including which subprocesses are affected by stimulation, is not completely understood. Aims: We investigated the effects of tDCS on working memory task-related spectral activity during and after tDCS to gain better insights into the neurophysiological changes associated with stimulation. Methods: We reanalysed data from 100 healthy participants grouped by allocation to receive either Sham (0 mA, 0.016 mA, and 0.034 mA) or Active (1 mA or 2 mA) stimulation during a 3-back task. Electroencephalography (EEG) data was used to analyse event-related spectral power in frequency bands associated with working memory performance. Results: Frontal theta event-related synchronisation (ERS) was significantly reduced post-tDCS in the active group. Participants receiving active tDCS had slower response times following tDCS compared to Sham, suggesting interference with practice effects associated with task repetition. Theta ERS was not significantly correlated with response times or accuracy. Conclusions: tDCS reduced frontal theta ERS post-stimulation, suggesting a selective disruption to working memory cognitive control and maintenance processes. These findings suggest that tDCS selectively affects specific subprocesses during working memory, which may explain heterogenous behavioural effects.

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A model for removing transcranial current stimulation artifacts in concurrently measured EEG

Cited by 2 publications

References 0 publications

Transcranial Direct Current Stimulation Modulates Working Memory Maintenance Processes in Healthy Individuals

Transcranial Direct Current Stimulation Modulates Working Memory Maintenance Processes in Healthy Individuals

TDCS Modulates Working Memory Maintenance Processes in Healthy Individuals

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