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Conscious perception of flickering stimuli in binocular rivalry and continuous flash suppression is not affected by tACS-induced SSR modulation

Georg Schauer, Carolina Yuri Ogawa, View ORCID ProfileNaotsugu Tsuchiya, Andreas Bartels
doi: https://doi.org/10.1101/788950
Georg Schauer
Centre for Integrative Neuroscience, University Hospital Tübingen, Tübingen, GermanyDepartment of Psychology, University of Tübingen, Tübingen, GermanyMax-Planck Institute for Biological Cybernetics, Tübingen, Germany
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  • For correspondence: georg.schauer@cin.uni-tuebingen.de
Carolina Yuri Ogawa
Centre for Integrative Neuroscience, University Hospital Tübingen, Tübingen, GermanyInstituto de Ciencias Biomédicas, Universidade de São Paulo, São Paulo, Brazil
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Naotsugu Tsuchiya
School of Psychological Sciences, Monash University, Clayton 3800, Victoria, AustraliaTurner Institute for Brain and Mental Health, Monash University, Clayton 3800, Victoria, AustraliaCenter for Information and Neural Networks (CiNet), National Institute of Information and Communications Technology (NICT), Suita, Osaka 565-0871, JapanAdvanced Telecommunications Research Computational Neuroscience Laboratories, 2-2-2 Hikaridai, Seika-cho, Soraku-gun, Kyoto 619-0288, Japan
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Andreas Bartels
Centre for Integrative Neuroscience, University Hospital Tübingen, Tübingen, GermanyDepartment of Psychology, University of Tübingen, Tübingen, GermanyMax-Planck Institute for Biological Cybernetics, Tübingen, Germany
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Abstract

The content of conscious perception is known to correlate with steady-state responses (SSRs), yet their causal relationship remains unclear. Can we manipulate conscious perception by directly interfering with SSRs through transcranial alternating current stimulation (tACS)? Here, we directly addressed this question in three experiments involving binocular rivalry and continuous flash suppression (CFS). Specifically, while participants (N=24) viewed either binocular rivalry or tried to detect stimuli masked by CFS, we applied sham or real tACS across parieto-occipital cortex at either the same or a different frequency and phase as an SSR eliciting flicker stimulus. We found that tACS did not differentially affect conscious perception in the forms of predominance, CFS detection accuracy, reaction time, or metacognitive sensitivity, confirmed by Bayesian statistics. We conclude that tACS application at frequencies of stimulus-induced SSRs does not have perceptual effects and that SSRs may be epiphenomenal to conscious perception.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted October 10, 2019.
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Conscious perception of flickering stimuli in binocular rivalry and continuous flash suppression is not affected by tACS-induced SSR modulation
Georg Schauer, Carolina Yuri Ogawa, Naotsugu Tsuchiya, Andreas Bartels
bioRxiv 788950; doi: https://doi.org/10.1101/788950
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Conscious perception of flickering stimuli in binocular rivalry and continuous flash suppression is not affected by tACS-induced SSR modulation
Georg Schauer, Carolina Yuri Ogawa, Naotsugu Tsuchiya, Andreas Bartels
bioRxiv 788950; doi: https://doi.org/10.1101/788950

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