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- W4309677599 abstract "ABSTRACT 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 1 st January 2000 until 1 st 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. PROSPERO registration number CRD42021255882 Highlights We conducted a meta-analysis and a systematic review on the efficacy of non-invasive brain stimulation for improving on visual function Visual cortex non-invasive brain stimulation can enhance contrast sensitivity, reduce crowding in peripheral vision and enhance visually evoked potential amplitude among normally sighted individuals." @default.
- W4309677599 created "2022-11-29" @default.
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- W4309677599 date "2022-11-22" @default.
- W4309677599 modified "2023-09-26" @default.
- W4309677599 title "Efficacy of Non-invasive Brain Stimulation on Vision: A Systematic Review and Meta-analysis" @default.
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- W4309677599 doi "https://doi.org/10.1101/2022.11.22.517490" @default.
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