Anodal occipital tDCS enhances spontaneous alpha activity

Wang, Yu; Chen, Xiaogang

doi:10.1016/j.neulet.2020.134796

Cited by 14 publications

(16 citation statements)

References 35 publications

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“…For instance, generally speaking, in clinical treatment (tDCS and ECT), the electrode used does not make direct contact with brain tissues. Even if the induced current value in this experiment (5-8 mA) is close to the value of tDCS (1-2 mA), 60 this cannot be used as a reference value for clinical treatment. On the one hand, the electric field does cause changes in the mechanical properties of brain tissue ex vivo, especially when the electrode is in direct contact with brain tissues; this undoubtedly plays a positive role in the study of the therapeutic mechanism of electrotherapy.…”

Section: 41mentioning

confidence: 79%

The effects of electric fields on the mechanical properties and microstructure of ex vivo porcine brain tissues

Zhang

Zhao

2022

Soft Matter

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Section: 41mentioning

confidence: 79%

The effects of electric fields on the mechanical properties and microstructure of ex vivo porcine brain tissues

Zhang

Zhao

2022

Soft Matter

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“…Four studies were pooled for analysis to assess the acute effect of tES on VEP amplitude, three utilized a-tDCS (27, 42, 46) and one adopted tACS (47). In studies that measured the acute effects of NIBS on different visual functions (e.g., contrast sensitivity and VEPs), the results from the VEP measure were taken (27, 47).…”

Section: Resultsmentioning

confidence: 99%

“…In total, 5265 studies were identified through the electronic database and manual searches, among which 19 were included in the review after sequential screening of the title, abstract and the full text (27,(35)(36)(37)(38)(39)(40)(41)(42)(43)(44)(45)(46)(47)(48)(49)(50)(51)(52). Appendix 2 summarizes the reasons for the studies excluded from metaanalysis.…”

Section: Characteristics Of the Included Studiesmentioning

confidence: 99%

Efficacy of Non-invasive Brain Stimulation on Vision: A Systematic Review and Meta-analysis

Bello

Wang

Park³

et al. 2022

Preprint

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Objective: Multiple studies have explored the use of non-invasive brain stimulation (NIBS) to enhance visual function. These studies vary in sample size, outcome measures, and NIBS methodology. We conducted a systematic review and meta-analyses to assess the effects of NIBS on visual functions in human participants with normal vision. Methods: We followed the PRISMA guidelines, and a review protocol was registered with PROSPERO before study commencement (CRD42021255882). We searched Embase, Medline, PsychInfo, PubMed, OpenGrey and Web of Science using relevant keywords. The search covered the period from 1st January 2000 until 1st September 2021. Comprehensive meta-analysis (CMA) software was used for quantitative analysis. Results: Forty-nine studies were included, of which 19 were included in a meta-analysis (38.8%). Meta-analysis indicated acute (Hedges's g=0.232, 95% CI: 0.023-0.442, p=0.029) and aftereffects (0.590, 95% CI: 0.182-0.998, p=0.005) of transcranial electrical stimulation (tES, including three different stimulation protocols) on contrast sensitivity. Visual evoked potential (VEP) amplitudes were significantly enhanced immediately after tES (0.383, 95% CI: 0.110-0.665, p=0.006). Both tES (0.563, 95% CI: 0.230 to 0.896, p=0.001) and anodal-transcranial direct current stimulation (a-tDCS) alone (0.655, 95% CI: 0.273 to 1.038, p=0.001) reduced crowding in peripheral vision. The effects of NIBS on visual acuity, motion perception and reaction time were not statistically significant. Conclusions: There are significant effects of visual cortex NIBS on contrast sensitivity, VEP amplitude, an index of cortical excitability, and crowding among normally sighted individuals. Future studies with robust experimental designs are needed to substantiate these findings in populations with vision loss.

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“…In addition, further independent component analysis (ICA) was used to remove EEG artifacts. Subsequently, the data were divided into 4-s epochs that overlapped by 50% for both eyes-open and eyes-closed states ( Dong et al, 2020 ). Fast Fourier transform (FFT) spectra were computed and averaged for all epochs.…”

Section: Methodsmentioning

confidence: 99%

The influence of different current-intensity transcranial alternating current stimulation on the eyes-open and eyes-closed resting-state electroencephalography

Wang

Hou

et al. 2022

Front. Hum. Neurosci.

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Transcranial alternating current stimulation (tACS) applies a sinusoidal oscillating current to modulate intrinsic oscillatory activity. Relevant studies of tACS have indicated that tACS can increase spontaneous brain activity in the occipital area. However, few studies have compared the effects of tACS with different current intensities on spontaneous brain activity in the occipital region. In this study, 10-Hz tACS was delivered to the occipital region at different current intensities (i.e., 1 and 2 mA). We investigated the effect of the tACS on both eyes-open and eyes-closed resting-state electroencephalography (EEG). A total of 20 subjects and fifteen subjects were recruited to participate in the 1-mA tACS experiment and the 2-mA tACS experiment, respectively. Ten subjects participated in both experiments. The experimental results demonstrated that both 1-mA tACS and 2-mA tACS could increase occipital resting-state EEG activities. For the eyes-open condition, alpha activity elicited by 2-mA tACS increased significantly greater than that elicited by 1-mA tACS, while 1-mA tACS could produce greater alpha activity compared to 2 mA for the eyes-closed condition. These results suggested that the optimal current intensity might be different for the eyes-open and eyes-closed resting-state conditions, laying a foundation for the subsequent study of occipital tACS on task-state EEG activities.

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Anodal occipital tDCS enhances spontaneous alpha activity

Cited by 14 publications

References 35 publications

The effects of electric fields on the mechanical properties and microstructure of ex vivo porcine brain tissues

The effects of electric fields on the mechanical properties and microstructure of ex vivo porcine brain tissues

Efficacy of Non-invasive Brain Stimulation on Vision: A Systematic Review and Meta-analysis

The influence of different current-intensity transcranial alternating current stimulation on the eyes-open and eyes-closed resting-state electroencephalography

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