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Time dynamics on information propagation in human brain performing hierarchical structure learning

Research Project

Project/Area Number 19K16894
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 51020:Cognitive and brain science-related
Research InstitutionKyoto University

Principal Investigator

Higashi Hiroshi  京都大学, 情報学研究科, 助教 (70734474)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsベイズ学習 / 強化学習 / EEG / 認知 / 脳波 / ベイズ推定 / 計算論的神経科学
Outline of Research at the Start

人は日常的に非常に複雑な問題に直面しているが,あまり意識することなく簡単に解いている.本研究では,人がどのように問題を解くかを,人の行動を予測する計算モデルを作ることで明らかにする.さらに,脳活動を計測することによって,提案する計算モデルの裏付けを行う.脳活動の計測には,神経の早い活動を捉えることができるEEGを用いる.これにより,学習するときの計算の順序や速さを明らかにする.

Outline of Final Research Achievements

The objective of this research was to examine the temporal dynamics of brain information processing during the updating of multiple parameters using Bayesian learning. While Bayesian learning regulates the computation of updates with multiple parameters, it does not specify the order in which the parameters should be updated. In this study, we defined the temporal dynamics as the update order and update speed (the time required for updating), and investigated them using a behavioral model and EEG analysis. Our findings indicate the following: 1) The update order was adaptively determined based on the certainty of the parameter estimate, which depends on the learning progress, and 2) The update computation was completed within 400 ms after the arrival of new information.

Academic Significance and Societal Importance of the Research Achievements

本研究は,情報をヒト脳に入力したときに,脳がどのようにその情報を処理し,脳内の外部環境に対する推定を更新するかを,時間ダイナミクスの観点から調査した.これまでの認知神経科学の研究では,学習を担う脳領域に着目することが多かった.これは脳の情報処理回路の回路構造を同定することを目的としている.一方で,時間ダイナミクスは,回路の構成部品がどのような役割を持っているかを知る手掛かりになる.本研究の成果は,脳回路に関する新たな知見と研究アプローチを提供しており,ヒトがどのように情報処理を行うかの解明に貢献する.

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (7 results)

All 2023 2022 2021 2020 2019

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (1 results) (of which Int'l Joint Research: 1 results) Book (1 results)

  • [Journal Article] Dimension-wise Sequential Update for Learning a Multidimensional Environment in Human2023

    • Author(s)
      Higashi Hiroshi
    • Journal Title

      Journal of Cognitive Neuroscience

      Volume: 35 Issue: 5 Pages: 841-855

    • DOI

      10.1162/jocn_a_01975

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Universality and superiority in preference for chromatic composition of art paintings2022

    • Author(s)
      Nakauchi Shigeki、Kondo Taisei、Kinzuka Yuya、Taniyama Yuma、Tamura Hideki、Higashi Hiroshi、Hine Kyoko、Minami Tetsuto、Linhares Joao M. M. 、Nascimento Sergio M. C.
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 4294-4294

    • DOI

      10.1038/s41598-022-08365-z

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] An Introductory Tutorial on Brain?Computer Interfaces and Their Applications2021

    • Author(s)
      Bonci Andrea、Fiori Simone、Higashi Hiroshi、Tanaka Toshihisa、Verdini Federica
    • Journal Title

      Electronics

      Volume: 10 Issue: 5 Pages: 560-560

    • DOI

      10.3390/electronics10050560

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] EEG-based personal identification method using unsupervised feature extraction and its robustness against intra-subject variability2020

    • Author(s)
      Nishimoto Takashi、Higashi Hiroshi、Morioka Hiroshi、Ishii Shin
    • Journal Title

      Journal of Neural Engineering

      Volume: 17 Issue: 2 Pages: 026007-026007

    • DOI

      10.1088/1741-2552/ab6d89

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Cooperative update of beliefs and state-transition functions in human reinforcement learning2019

    • Author(s)
      Higashi Hiroshi、Minami Tetsuto、Nakauchi Shigeki
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 17794-17794

    • DOI

      10.1038/s41598-019-53600-9

    • NAID

      120006773081

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Data generation for missing frequencies in SSVEP-based brain computer interfaces2022

    • Author(s)
      Z. Zhou, H. Higashi, S. Ishii
    • Organizer
      The 19th Pacific Rim International Conference on Artificial Intelligence
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Book] 脳波処理とブレイン・コンピュータ・インタフェース2022

    • Author(s)
      東 広志、中西 正樹、田中 聡久
    • Total Pages
      218
    • Publisher
      コロナ社
    • ISBN
      4339014044
    • Related Report
      2022 Annual Research Report

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Published: 2019-04-18   Modified: 2024-01-30  

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