September 2019
Volume 19, Issue 10
Open Access
Vision Sciences Society Annual Meeting Abstract  |   September 2019
Lateralized occipitotemporal tDCS modulates dynamics of binocular rivalry between faces and words
Author Affiliations & Notes
  • Linan Shi
    State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences
  • Zhouyuan Sun
    State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences
  • Geoffrey F. Woodman
    Department of Psychology, Center for Integrative and Cognitive Neuroscience, Vanderbilt Vision Research Center, Vanderbilt University
  • Peng Zhang
    State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences
  • Sheng He
    State Key Laboratory of Brain and Cognitive Science, Institute of Biophysics, Chinese Academy of Sciences
    Department of Psychology, University of Minnesota
Journal of Vision September 2019, Vol.19, 62b. doi:https://doi.org/10.1167/19.10.62b
  • Views
  • Share
  • Tools
    • Alerts
      ×
      This feature is available to authenticated users only.
      Sign In or Create an Account ×
    • Get Citation

      Linan Shi, Zhouyuan Sun, Geoffrey F. Woodman, Peng Zhang, Sheng He; Lateralized occipitotemporal tDCS modulates dynamics of binocular rivalry between faces and words. Journal of Vision 2019;19(10):62b. doi: https://doi.org/10.1167/19.10.62b.

      Download citation file:


      © ARVO (1962-2015); The Authors (2016-present)

      ×
  • Supplements
Abstract

During binocular rivalry, the relative dominance times of the two competing images are influenced by both low level image factors as well as high level object properties. In a previous study (He & Liu, VSS 2010), we demonstrated that for rivalry between faces and words, there was a face advantage for left visual field presentation and a word advantage for right visual field presentation. This is due to the fact that face and word representations are biased towards the right hemisphere and left occipitotemporal cortex respectively. In the current study, we went beyond the previous correlational observation and investigated potential causal effects from lateralized tDCS stimulations. While observers viewed centrally presented streams of faces and words engaged in binocular rivalry, tDCS (anodal or cathodal) was applied to the left or right occipitotemporal cortex. Results from 11 participants show that, compared to the sham condition, right occipitotemporal anodal tDCS significantly increased the relative dominance durations of faces over words, while cathodal tDCS significantly reduced the relative face dominance. However, left occipitotemporal tDCS had little effect on their relative dominance durations. In addition to the effect on relative dominance, Anodal, but not cathodal, tDCS of either left or right occipitotemporal sites led to more rapid rivalry switching. Together, our results suggest that tDCS could selectively strengthen or weaken high level representations of visual inputs, and causally modulate rivalry competition at an earlier stage through recurrent processing. Additionally, anodal tDCS likely increased neuronal excitability and noise levels, leading to more frequent rivalry switching.

×
×

This PDF is available to Subscribers Only

Sign in or purchase a subscription to access this content. ×

You must be signed into an individual account to use this feature.

×