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A Cognitive Neuroscience Study of Mechanisms of Speech Nonfluency in Developmental Stuttering and Autism Spectrum Disorders

Research Project

Project/Area Number 20K07725
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 InstitutionTokyo Metropolitan University

Principal Investigator

Ryuichiro Hashimoto  東京都立大学, 人文科学研究科, 教授 (00585838)

Co-Investigator(Kenkyū-buntansha) 太田 晴久  昭和大学, 大学共同利用機関等の部局等, 准教授 (00439366)
板橋 貴史  昭和大学, 大学共同利用機関等の部局等, 講師 (70636943)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords発達性吃音 / 自閉スペクトラム症 / 発話 / 聴覚 / 注意欠如・多動症 / 聴覚情報処理 / 発達障害 / MRI / 神経発達障害
Outline of Research at the Start

発話の非流暢性は、発達性吃音、自閉スペクトラム症を含む神経発達障害において観察されるが、神経発達障害群における脳ネットワークの特徴は解明されていない。本研究は、精神科医、情報工学者、耳鼻科医、言語聴覚士を含む研究チームを形成し、発達性吃音、自閉スペクトラム症の構造・機能的MRIを含むマルチモーダルMRIデータを取得し、神経発達障害群における非流暢性発話の脳内システムの特徴を明らかにする。

Outline of Final Research Achievements

We conducted a cognitive neuroscience study on the mechanisms of developmental stuttering and non-fluent speech observed in autism spectrum disorders and other neurodevelopmental disorders. For developmental stuttering, we conducted a meta-analysis of data from previously published MRI studies to identify changes in the brain networks involved in language and speech functions, and revealed changes in the microstructure of white matter and functional connections between brain regions. For autism spectrum disorder, we conducted functional fMRI studies and auditory behavioral experiments based on the hypothesis that altered auditory processing may underlie nonfluent speech. We observed reduced functional connectivity in an important brain pathway in the left hemisphere for speech production, which suggested an altered speech network in autism spectrum disorder.

Academic Significance and Societal Importance of the Research Achievements

これまでに発達性吃音の脳ネットワークの変容についての報告はあったが、個別研究のサンプルサイズやデータ解析手法の異種性により、結果の不一致も目立った。本研究で研究手法をある程度均一化し、メタ解析によって発達性吃音の脳構造と機能の変容を示した意義は大きいと思われる。自閉スペクトラム症については、発話関連システムに着目した研究は少なく、また、実験室の統制された条件で示された聴覚情報処理の特性と日常の聞こえの問題の関連性が示されたことは、学術のみならず、社会的意義があると思われる。

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

    (7 results)

All 2023 2021 2020

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (4 results)

  • [Journal Article] Meta-analysis of structural integrity of white matter and functional connectivity in developmental stuttering2023

    • Author(s)
      Kengo Matsuhashi, Takashi Itahashi, Ryuta Aoki, Ryu-ichiro Hashimoto
    • Journal Title

      Brain Research Bulletin

      Volume: 205 Pages: 1-13

    • DOI

      10.1016/j.brainresbull.2023.110827

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Brain activations while processing degraded speech in adults with autism spectrum disorder2021

    • Author(s)
      Lin, IF., Itahashi, T., Kashino, M., Kato, N., & Hashimoto, R.
    • Journal Title

      Neuropsychologia

      Volume: 152 Pages: 1-9

    • DOI

      10.1016/j.neuropsychologia.2021.107750

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 発達性吃音に対する経頭蓋直流電気刺激2020

    • Author(s)
      橋本龍一郎
    • Journal Title

      臨床精神医学

      Volume: 49 Pages: 749-755

    • Related Report
      2020 Research-status Report
  • [Presentation] 発達性吃音の脳活動に対する発話非流暢性の特性効果および状態効果に関するメタ解析2023

    • Author(s)
      松橋憲吾、板橋貴史、青木隆太、橋本龍一郎
    • Organizer
      第46回日本神経科学大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Altered cortical responses in human voice areas to emotional valence in adults with autism spectrum disorders2023

    • Author(s)
      Hashimoto, R., Okada, R., Nakamura, M., Ohta, H., & Itahashi, T.
    • Organizer
      第46回日本神経科学大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 経頭蓋直流刺激を用いた発達性吃音の発話流暢性の向上2021

    • Author(s)
      橋本龍一郎
    • Organizer
      第117回日本精神神経学会学術総会
    • Related Report
      2021 Research-status Report
  • [Presentation] Effect of transcranial direct current stimulation to language-related regions on speech motor control.2020

    • Author(s)
      Matsuhashi, K., Yada, Y., & Hashimoto, R.
    • Organizer
      第43回日本神経科学大会
    • Related Report
      2020 Research-status Report

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

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