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Evaluation of sensory weighting and joint strategy in balance control for horizontal sway of the support surface

Research Project

Project/Area Number 20K04366
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 20010:Mechanics and mechatronics-related
Research InstitutionKochi University of Technology

Principal Investigator

Sonobe Motomichi  高知工科大学, システム工学群, 准教授 (50455169)

Co-Investigator(Kenkyū-buntansha) 池内 昌彦  高知大学, 教育研究部医療学系臨床医学部門, 教授 (00372730)
永野 靖典  高知大学, 教育研究部医療学系臨床医学部門, 助教 (30380372)
Project Period (FY) 2020-04-01 – 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: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywordsバランス / 検査 / 感覚器重みづけ / 制御戦略 / フォースプレート / 慣性センサ / 体性感覚 / 前庭感覚 / バランス戦略 / 重心 / 頭部加速度 / 定常応答 / 感覚器 / 低周波揺動 / バランス評価 / 関節戦略
Outline of Research at the Start

バランス能力の低下の要因として,複数の感覚器,情報伝達の時間遅れ,筋力や関節戦略が考えられるが,原因となる機能の特定が難しい.本研究では,周期的な外部刺激によって各機能の貢献度が異なる運動(モード)を励起し,身体機能別のバランス評価を提案する.
解決すべき課題として,①前後への台車の周期的な揺動によって,任意の機能が支配的な運動を励起する.狙った運動を引き出すための揺動周波数や振幅を検討し,各機能の貢献度を確認する.②被験者に負担をかけずに必要な姿勢情報を得るための新たな計測法を開発する.③医療現場と連携し,体性感覚の疾患を対象として評価と疾患の因果関係を示す,ことが挙げられる.

Outline of Final Research Achievements

This study aimed to obtain basic knowledge for utilizing the differences in subjects' responses to constant-frequency sway for checking the sensory re-weighting and joint strategies. To clear the findings on frequency-dependent strategies, we conducted our experiments on healthy subjects. The results showed that subjects used only the ankle joint strategy at lower frequencies, bounded by approximately 0.7 Hz, and the hip joint strategy gradually increased at higher frequencies. Regarding sensory weighting, at frequencies higher than around 0.4 Hz, the dominant strategy was a vestibular sensation, which controls the head acceleration, while at lower frequencies, the dominant strategy was somatosensory, which controls the center of mass. To investigate the somatosensory perception of diabetic patients, The result of the constant frequency test at 0.3 Hz showed that the phase difference between the center of pressure and the center of mass was larger than that of healthy subjects.

Academic Significance and Societal Importance of the Research Achievements

感覚器重みづけというテーマで多くの研究が行われてきたが,特に前庭感覚と体性感覚の重みづけを正確に測る手法は発泡材上での立位といった原始的な方法に限られており,動作の正確な計測も困難であった.本研究では,一定周波数揺動の周波数を変えることで感覚器の重みづけを変化させて,その機能を評価することを試みている.このアプローチは,体性感覚障害が起こる糖尿病患者,頚髄症患者や,前庭感覚障害が起こるめまい患者における感覚器障害の程度を詳しく知りたいときに活用できる可能性が高く,糖尿病患者の計測では健常者との違いがみられた.

Report

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

    (7 results)

All 2023 2022 2021

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

  • [Journal Article] Center of Mass Estimation Using a Force Platform and Inertial Sensors for Balance Evaluation in Quiet Standing2023

    • Author(s)
      Motomichi Sonobe, Yoshio Inoue
    • Journal Title

      Sensors

      Volume: 23 Issue: 10 Pages: 1-16

    • DOI

      10.3390/s23104933

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Balance response of human standing on a cart at constant frequencies (Interpretation of the steady-state response based on mechanical models)2021

    • Author(s)
      SONOBE Motomichi、INOUE Yoshio
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 87 Issue: 898 Pages: 21-00020-21-00020

    • DOI

      10.1299/transjsme.21-00020

    • NAID

      130008057132

    • ISSN
      2187-9761
    • Related Report
      2021 Research-status Report 2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 支持面一定周波数揺動に対する立位バランス応答の定常性評価2023

    • Author(s)
      田中創,園部元康
    • Organizer
      日本機械学会 中国四国学生会 第53回学生員卒業研究発表講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] フォースプレートを用いた重心推定に基づく身体バランス評価法の重力感受性障害を持つめまい患者への適用2022

    • Author(s)
      園部元康,和田佳郎,塩崎智之,北原糺
    • Organizer
      第81回日本めまい平衡医学会総会・学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 遅延を含む人の立位バランスシステムにおける状態推定2022

    • Author(s)
      常田仁,園部元康
    • Organizer
      第65回自動制御連合講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Reliability of standing model and identification technique in response to support surface perturbation2022

    • Author(s)
      Jin Tsuneda, Motomichi Sonobe
    • Organizer
      19th Asia-Pacific Vibration Conference (APVC2021)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 定常応答に基づく立位バランスの遅延時間同定の妥当性2022

    • Author(s)
      板谷祐汰,園部元康,常田仁
    • Organizer
      日本機械学会 Dynamics and Design Conference 2022
    • Related Report
      2022 Annual Research Report

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Published: 2020-04-28   Modified: 2024-01-30  

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