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Visual System

開催日 2014/9/12
時間 14:00 - 15:00
会場 Poster / Exhibition(Event Hall B)

Flashing lights Enhance Visual Perception through Long Delayed Cortical Depolarization

  • P2-140
  • 舟山 健太 / Kenta Funayama:1 南澤 玄樹 / Genki Minamisawa:1 松本 信圭 / Nobuyoshi Matsumoto:1 番 拝 / Hiroshi Ban:2 松木 則夫 / Norio Matsuki:1 池谷 裕二 / Yuji Ikegaya:1,2 
  • 1:東京大学大学院 / Laboratory of Chemical Pharmacology, Graduate School of Pharmaceutical Sciences, The University of Tokyo 2:脳情報通信センター / Center for Information and Neural Networks, Suita City, Osaka, Japan  

The primary visual cortex is no longer one of the passive hierarchical structures of visual system. Besides its role in encoding time-changing visual information in everyday life, it is proposed to contain recent visual history through delayed activation. To thoroughly understand the rules that govern the visual processing taken by the primary visual cortex, it is essential to reveal how recent stimulus history affects the processing of upcoming information. Here, we demonstrated that long-delayed activation of the primary visual cortex occurs after a simple featured flashing light. By in vivo whole-cell patch-clamp recording and functional two-photon calcium imaging of layer 2/3 neurons, we found out that late response represented recent visual history with high specificity. We then asked how this response interferes with subsequent visual input. As a result, preceding presentation of featured flash potentiated activities of visual cortical neurons in an orientation-selective manner. Behavioural consequences of this neuronal modulation were observed in both mice and humans, enhancing visual perception to a specific stimulus orientation. Therefore, ongoing visual processing could be dynamically modulated even at the first stage of cortical hierarchy through late cortical depolarization.

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