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Reactivation of memory representation by pattern stimulation of the brain

Research Project

Project/Area Number 17H06268
Research Category

Grant-in-Aid for Challenging Research (Pioneering)

Allocation TypeSingle-year Grants
Research Field Brain sciences and related fields
Research InstitutionKochi University of Technology

Principal Investigator

Nakahara Kiyoshi  高知工科大学, 情報学群, 教授 (50372363)

Co-Investigator(Kenkyū-buntansha) 川嵜 圭祐  新潟大学, 医歯学系, 准教授 (60511178)
Project Period (FY) 2017-06-30 – 2020-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥26,000,000 (Direct Cost: ¥20,000,000、Indirect Cost: ¥6,000,000)
Fiscal Year 2019: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2018: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2017: ¥14,950,000 (Direct Cost: ¥11,500,000、Indirect Cost: ¥3,450,000)
Keywords視覚再構成 / 錯視 / 一次視覚野 / 皮質脳波 / 深層ニューラルネット / 顕在記憶 / 視覚意識 / 再構成 / デコーディング / 陳述記憶 / 記憶想起 / 連合記憶 / 視覚 / 側頭葉
Outline of Final Research Achievements

We attempted to reconstruct visual images from visual responses of electrocorticogram (ECoG) in the monkey primary visual cortex (V1). We also examined ECoG responses to the illusory surface perceived by color filling-in using one kind of the illusory images, "the neon color spreading". We are currently conducting the reconstruction of the visual image using a deep neural network. As a result of analyzing the ECoG responses to the illusory surface, we found visual responses to the perception of the illusory surface between 150 ms and 200 ms after the stimulus onset. The spatial extent of the visual response to the illusory surface in V1 was approximately the same as the visual angle of the perceived illusion in the horizontal direction, while it was more expanded in the vertical direction.

Academic Significance and Societal Importance of the Research Achievements

現在、サルV1のECoG応答を特徴量として視覚像の再構成を進めている。これが成功すれば、V1における情報のみで視覚像の再構成が可能であることが示され、将来的にはbrain-machine interfaceへの応用が可能となる。
またECoG法を使って初めて色の補填による面の錯視に対するV1の視覚応答を明らかにした。錯視による視覚応答のV1における空間的な広がりは、実際に知覚される錯視の視野角に対して水平方向はほぼ一致していたのに対して、垂直方向にはより広範囲に広がっていた。これはV1内部の、網膜部位再現において垂直な方向の神経結合が色補填に重要な役割を果たすことを示唆するものである。

Report

(4 results)
  • 2020 Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (2 results)

All 2019 2018

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results)

  • [Journal Article] Locally induced neuronal synchrony precisely propagates to specific cortical areas without rhythm distortion.2018

    • Author(s)
      Toda H, Kawasaki K, Sato S, Horie M, Nakahara K, Bepari AK, Sawahata H, Suzuki T, Okado H, Takebayashi H, Hasegawa I.
    • Journal Title

      Scientific Reports

      Volume: - Issue: 1 Pages: 7678-7678

    • DOI

      10.1038/s41598-018-26054-8

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 硬膜上高密度多点電極を用いたサル一次視覚野における網膜視野の再構成2019

    • Author(s)
      土屋貴大,飯島淳彦,川嵜圭祐,鈴木隆文,長谷川功,中原潔
    • Organizer
      第66回中部生理学会
    • Related Report
      2018 Annual Research Report

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Published: 2017-07-21   Modified: 2022-01-27  

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