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Reverse Engineering of Connectome: Elucidating Brain Information Processing Architecture by Network Analysis

Research Project

Project/Area Number 20K12060
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 62010:Life, health and medical informatics-related
Research InstitutionThe University of Tokyo

Principal Investigator

OKAMOTO HIROSHI  東京大学, 大学院工学系研究科(工学部), 特任研究員 (00374067)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywordsコネクトーム / 複雑ネットワーク / 機能モジュール / コミュニティ / 視覚野 / 腹側経路 / 背側経路 / 階層構造 / クラスタ数 / 自動決定 / 安定性 / 重なり / 階層性 / べき分布 / 深層ニューラルネットワーク / 複雑ネットワーク科学 / 脳情報処理様式
Outline of Research at the Start

情報処理機械としての脳の本質はネットワーク構造にある。全脳におけるネットワーク地図―コネクトーム―を描き出す試みが世界中で活発に進められており、それらの結果が利用可能なデータとして公開されている。本研究は、脳が情報を処理する仕組み(脳情報処理様式)をコネクトームから導出できる、ということを示す。機械知能の分野で優れたオブジェクト認識性能を示す深層学習は、視覚野の情報処理様式を擬している、と考えられている。視覚野のコネクトームの構造を分析してこの考えを検証する。すなわち、深層学習の多層・フィードフォワード結合様式と実際の視覚野のネットワーク様式との整合および相違を明らかにする。

Outline of Final Research Achievements

We developed a method for extracting the hierarchical structure of soft-overlapping communities from complex networks, which is called modular decomposition of Markov chain (MDMC). We examined the block diagram of brain information processing from the connectome using MDMC, a process referred to as reverse engineering of the connectome. We identified ventral and dorsal pathways as communities in the high-resolution mouse visual cortical connectome. We also extracted the hierarchical structure of the communities and identified two additional modules that corresponded to a visual field gate and ventral-dorsal bridge. We showed that these community structures identified by MDMC are stable; therefore, the mouse visual cortex actually has functions corresponding to these communities.

Academic Significance and Societal Importance of the Research Achievements

霊長類の視覚野はオブジェクト認識に関わる腹側経路と空間認識に関わる背側経路に機能分化していることが、マクロレベルの実験・観測を通じて知られてきた。高解像コネクトームのネットワーク分析を行い、マウス視覚野も腹側経路と背側経路に分岐することを、ミクロレベルから初めて明らかにした。本研究が提案したコネクトームのリバースエンジニアリングの方法は、脳以外の、生物・工学・社会システムの機能分析にも展開可能である。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (11 results)

All 2023 2022 2021 2020

All Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (6 results) (of which Int'l Joint Research: 5 results)

  • [Journal Article] 企業ネットワークの動的メゾスコピック構造2023

    • Author(s)
      山野 泰子、岡本 洋、坂田 一郎
    • Journal Title

      Journal of the Japanese Society for Artificial Intelligence

      Volume: 38 Issue: 2 Pages: 117-124

    • DOI

      10.11517/jjsai.38.2_117

    • ISSN
      2188-2266, 2435-8614
    • Year and Date
      2023-03-01
    • Related Report
      2022 Research-status Report
  • [Journal Article] Testing the power-law hypothesis of the interconflict interval2023

    • Author(s)
      Okamoto Hiroshi、Yoshimoto Iku、Kato Sota、Ahsan Budrul、Shinohara Shuji
    • Journal Title

      Scientific Reports

      Volume: 13 Issue: 1 Pages: 22686-22686

    • DOI

      10.1038/s41598-023-50002-w

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Detecting hierarchical organization of pervasive communities by modular decomposition of Markov chain2022

    • Author(s)
      Okamoto Hiroshi、Qiu Xule
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 20211-20211

    • DOI

      10.1038/s41598-022-24567-x

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Simulation of foraging behavior using a decision-making agent with Bayesian and inverse Bayesian inference: Temporal correlations and power laws in displacement patterns2022

    • Author(s)
      Shinohara Shuji、Okamoto Hiroshi、Manome Nobuhito、Gunji Pegio-Yukio、Nakajima Yoshihiro、Moriyama Toru、Chung Ung-il
    • Journal Title

      Chaos, Solitons & Fractals

      Volume: 157 Pages: 111976-111976

    • DOI

      10.1016/j.chaos.2022.111976

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A new method of Bayesian causal inference in non-stationary environments2020

    • Author(s)
      Shinohara Shuji、Manome Nobuhito、Suzuki Kouta、Chung Ung-il、Takahashi Tatsuji、Okamoto Hiroshi、Gunji Yukio Pegio、Nakajima Yoshihiro、Mitsuyoshi Shunji
    • Journal Title

      PLOS ONE

      Volume: 15 Issue: 5 Pages: e0233559-e0233559

    • DOI

      10.1371/journal.pone.0233559

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] To be existent is to be stable: automatic determination of the number of communities2023

    • Author(s)
      Hiroshi Okamoto
    • Organizer
      International School and Conference on Network Science (NetSci2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] To be existent is to be stable: detecting the optimal number of communities2023

    • Author(s)
      Hiroshi Okamoto
    • Organizer
      The 12th International Conference on Complex Networks and Their Applications (Complex Networks 2023)
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A power law approach to predicting international conflicts: Lewis Fry Richardson revisited2023

    • Author(s)
      Hiroshi Okamoto, Budrul Ahsan, Yu Minematsu, Iku Yoshimoto, Sota Kato,
    • Organizer
      The 81th Annual Midwest Political Science Conference (MPSA2023)
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Testing the Power-Law Hypothesis of Inter-Conflict Intervals2022

    • Author(s)
      Hiroshi Okamoto, Iku Yoshimoto, Sota Kato, Budrul Ahsan,
    • Organizer
      The 80th Annual Midwest Political Science Conference (MPSA2022)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] マウス視覚野高解像コネクトームにおけるコミュニティ構造:腹側および背側経路2022

    • Author(s)
      岡本洋,鈴木雄大
    • Organizer
      第17回 ネットワーク生態学シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] A Power-Law Approach to Occurrence Prediction of Political Events2021

    • Author(s)
      Hiroshi Okamoto, Budrul Ahsan, Sota Kato
    • Organizer
      117th American Political Science Association’s Annual Meeting & Exhibition
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2025-01-30  

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