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Finding measures of interaction among cortical regions from time series in sleep studies

Research Project

Project/Area Number 21K12646
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 90110:Biomedical engineering-related
Research InstitutionYamaguchi University

Principal Investigator

Abe Takeshi  山口大学, 大学院医学系研究科, 助教 (10819402)

Co-Investigator(Kenkyū-buntansha) 浅井 義之  山口大学, 大学院医学系研究科, 教授 (00415639)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2023: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2022: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2021: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords高次スペクトル解析 / cross-bicoherence / グレンジャー因果性 / Granger因果性解析 / 睡眠検査 / 機能的結合性
Outline of Research at the Start

睡眠障害を適切に診断治療するには、睡眠の質を客観的な基準で評価することが求められる。臨床における睡眠検査では、脳波や循環、呼吸についての多変量時系列データにより脳活動を観測する。本研究の目的は、睡眠中の大脳皮質領域間で向きのある非線形な相互作用を定量するのに適した指標を明らかにし、上記時系列データから統計量として推定する手法を提案することである。本研究の計画では、神経ネットワークの数理モデルから生成されたシグナルのcross-bicoherenceを推定する手法を確立し、睡眠検査で得られた時系列データから睡眠ステージの推移がどのような皮質領域間の機能的相互作用の変化を伴うかを明らかにする。

Outline of Final Research Achievements

Multivariate time series data from sleep studies reflect brain activities with cortical regions interacting to process information. While objective measures of linear interactions like Granger-causality exist, their clinical utility remains uncertain due to limitations in detecting nonlinear interactions in noisy settings. In this study, we investigated cross-bicoherence -- a higher-order spectral statistic -- as a promising indicator of nonlinear interaction. Our results of simulation studies demonstrate that cross-bicoherence provides greater power for detecting quadratic phase coupling, a hallmark of nonlinear interaction, than bivariate spectral Granger-causality does, when applied to sample time series of perturbed periodic signals. These findings encourage the clinical application of the higher-order spectral measure.

Academic Significance and Societal Importance of the Research Achievements

本研究の成果として、(1)擾乱された非線形な相互作用を再現可能な数理モデルを提案したこと、(2)高次スペクトル統計量の1つcross-bicoherenceによって、サンプルされた多変量時系列データから非線形な相互作用の特徴を効率的に検出できることを示したこと、そして(3)実施したシミュレーション研究に用いた関数を実装したRプログラミング言語のパッケージを一般に公開し再利用可能にしたことが挙げられる。これらの成果により、高次スペクトル時系列解析の臨床応用を先導し継続的な研究開発を可能にしたという意義がある。

Report

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

    (12 results)

All 2024 2022 2021 Other

All Int'l Joint Research (3 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results) (of which Int'l Joint Research: 1 results) Remarks (3 results) Patent(Industrial Property Rights) (3 results)

  • [Int'l Joint Research] University of Lausanne(スイス)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] University of Lausanne/Geneva University Hospitals(スイス)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] University of Lausanne/Neuroheuristic Research Group(スイス)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Detection of quadratic phase coupling by cross-bicoherence and spectral Granger causality in bifrequencies interactions2024

    • Author(s)
      Abe Takeshi、Asai Yoshiyuki、Lintas Alessandra、Villa Alessandro E. P.
    • Journal Title

      Scientific Reports

      Volume: 14 Issue: 1 Pages: 8521-8521

    • DOI

      10.1038/s41598-024-59004-8

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] システム医学による疾患機序解明と予測2022

    • Author(s)
      浅井義之, 早野崇英, 安部武志, 中津井雅彦
    • Journal Title

      Precision Medicine

      Volume: 5 Pages: 1100-1103

    • Related Report
      2022 Research-status Report
  • [Presentation] Phase coupling in interaction networks of neural mass models of cortical columns.2021

    • Author(s)
      Takeshi Abe, Yoshiyuki Asai, Alessandro E.P. Villa
    • Organizer
      14th International Neural Coding Workshop (NC2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Remarks] rhosa: Higher-Order Spectral Analysis

    • URL

      https://cran.r-project.org/package=rhosa

    • Related Report
      2023 Annual Research Report 2022 Research-status Report 2021 Research-status Report
  • [Remarks] Detection of phase coupling in interacting netw...

    • URL

      https://doi.org/10.36227/techrxiv.19606189

    • Related Report
      2021 Research-status Report
  • [Remarks] Causal Interactions Among Cortical Regions Duri...

    • URL

      https://doi.org/10.1007/978-981-16-0317-4_40

    • Related Report
      2021 Research-status Report
  • [Patent(Industrial Property Rights)] タイムラプス画像判別器とタイムラプス画像判別器の学習方法と胚判別装置と胚判別方法2022

    • Inventor(s)
      杉野法広、前川亮、浅井義之、中津井雅彦、安部武志、桐谷太郎
    • Industrial Property Rights Holder
      国立大学法人 山口大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2022-105764
    • Filing Date
      2022
    • Related Report
      2022 Research-status Report
  • [Patent(Industrial Property Rights)] 副作用の被疑薬推定支援装置と被疑薬推定支援プログラムと被疑薬推定支援方法2021

    • Inventor(s)
      浅井義之、濱田和希、安部武志、幸田恭治
    • Industrial Property Rights Holder
      山口大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-151548
    • Filing Date
      2021
    • Related Report
      2021 Research-status Report
  • [Patent(Industrial Property Rights)] 妊娠高血圧症候群の発症予測支援システムと発症予測支援プログラムと発症予測支援方法2021

    • Inventor(s)
      前川亮、安部武志、浅井義之、杉野法広、品川征大
    • Industrial Property Rights Holder
      山口大学
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-190763
    • Filing Date
      2021
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-11-21  

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