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Establishment of a magnetoencephalographic method to estimate verbal memory

Research Project

Project/Area Number 21K07260
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 51020:Cognitive and brain science-related
Research InstitutionOsaka University

Principal Investigator

Araki Toshihiko  大阪大学, 医学部附属病院, 技術職員 (20755277)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2023: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2022: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords言語記憶力 / 脳磁図 / 脳活動 / てんかん / 言語機能 / 脳律動 / 言語性記憶力 / バイオマーカー
Outline of Research at the Start

本研究では認知症やてんかんなど記憶力の低下した患者群において、言語を考えている間の脳活動を脳波計よりも高精度な脳磁図を用いて詳細に計測し、脳活動の強さと言語に関する記憶力テストの点数との関係性を明らかにする。さらに、患者群と健常成人群での結果を比較することで脳活動から言語性記憶力を推定するための新たな臨床検査法の確立を目指す。この検査法が確立できれば、従来の記憶力検査よりも検査課題が非常に容易でかつ短時間で検査が可能となり、患者にとって心身ともに負担の少ない言語記憶力検査法として非常に有益である。

Outline of Final Research Achievements

In this study, we sought to establish a method for testing language memory using magnetoencephalography (MEG) by examining the relationship between brain activity during language tasks and verbal memory scores in patients with epilepsy. Although no significant correlation was found across all frequency bands, a relatively strong negative correlation was observed between the power of brain activity in the α band in the left hemisphere, occurring 0.5 seconds after the presentation of the language task, and the verbal memory scores. This finding is consistent with the brain regions where a significant negative correlation was previously found in healthy adults, suggesting that, in patients with epilepsy, brain activity in the α band in the same brain regions is related to verbal memory capacity.

Academic Significance and Societal Importance of the Research Achievements

先行研究で健常者において認められた脳活動と言語性記憶力との相関が、本研究では認知機能の低下したと想定されるてんかん患者でも同様の相関がみられることが示唆された。これにより、脳磁図を用いて脳活動から言語性記憶力を推定する臨床検査法の確立につながるものと期待され、今後、てんかん患者だけでなく認知症など様々な疾患群にて同様の検討をすることで、脳磁図による簡便で患者に負担の少ない言語性記憶力検査法の開発に寄与すると考えられる。

Report

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

    (5 results)

All 2024 2023 2022

All Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (3 results)

  • [Journal Article] A deep learning model for the detection of various dementia and MCI pathologies based on resting-state electroencephalography data: A retrospective multicentre study.2024

    • Author(s)
      Watanabe Y, Miyazaki Y, Hata M, Fukuma R, Aoki Y, Kazui H, Araki T, Taomoto D, Satake Y, Suehiro T, Sato S, Kanemoto H, Yoshiyama K, Ishii R, Harada T, Kishima H, Ikeda M, Yanagisawa T.
    • Journal Title

      Neural Netw

      Volume: 171 Pages: 242-250

    • DOI

      10.1016/j.neunet.2023.12.009

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A prospective multicenter validation study of a machine learning algorithm classifier on quantitative electroencephalogram for differentiating between dementia with Lewy bodies and Alzheimer’s dementia.2022

    • Author(s)
      Suzuki Y, Suzuki M, Shigenobu K, Shinosaki K, Aoki Y, Kikuchi H, Baba T, Hashimoto M, Araki T, Johnsen K, Ikeda M, & Mori E.
    • Journal Title

      PLoS ONE

      Volume: 17 Issue: 3 Pages: e0265484-e0265484

    • DOI

      10.1371/journal.pone.0265484

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] てんかん患者における脳磁図を用いた脳活動と言語性記憶力との関係性2023

    • Author(s)
      荒木俊彦
    • Organizer
      第72回日本医学検査学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] てんかん小児における発達特性と脳機能の検討2022

    • Author(s)
      岩谷祥子、下野九理子、浅井映美子、荒木俊彦、寒川あゆみ、富永康仁、大薗恵一、谷池雅子
    • Organizer
      第64回日本小児神経学会学術集会
    • Related Report
      2022 Research-status Report
  • [Presentation] てんかん小児における脳機能と社会性発達の検討2022

    • Author(s)
      岩谷祥子、荒木俊彦、寒川あゆみ、寺岡佐也子、浅井映美子、谷池雅子、下野九理子
    • Organizer
      第52回日本臨床神経生理学会学術大会
    • Related Report
      2022 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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