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Elucidation of the neural mechanisms underlying motor recovery after spinal cord injury using a musclo-spinal interface

Research Project

Project/Area Number 20K19377
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 59010:Rehabilitation science-related
Research InstitutionKyoto University (2022-2023)
Tokyo Metropolitan Institute of Medical Science (2020-2021)

Principal Investigator

Kaneshige Miki  京都大学, 医学研究科, 助教 (40867868)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2020: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords脊髄 / 筋 / 電気刺激 / 一次運動野 / 機能回復 / 脊髄損傷 / 刺激 / 筋肉 / 人工神経接続 / 適応
Outline of Research at the Start

脊髄損傷により、大脳皮質から脊髄への運動指令が阻害されると運動麻痺が生じる。本邦の疫学調査によると、患者の約6割は不全麻痺であり、部分的に随意筋活動が残存しているものの、彼らは損傷前と同様に自分の身体を動かすことは出来ない。本研究では、不全麻痺を呈する脊髄損傷を対象に、麻痺肢の減弱した随意筋活動を使って、損傷より下位の脊髄を電気刺激する筋→脊髄間人工神経接続を開発する。そして、脊髄損傷後の運動機能の回復と機能回復に内在する神経機序の解明を行う。

Outline of Final Research Achievements

To recover from paresis after incomplete spinal cord injury, we developed a musclo-spinal interface from the weakened voluntary muscle activity of the paretic limb to the spinal cord below the injury. We recorded the spinal outputs, cell activities in the primary motor cortex, and behavioral data during the rehabilitation using the muscle-spinal interface. As a result, we found that rehabilitation using the musclo-spinal interface restored motor function after spinal cord injury, and that this is due to an increase in spinal outputs and a decrease in modulation of the neuronal activity in primary motor cortex. We presented our findings at an academic conference, and some of the results were published as a paper. We are currently preparing to submit a paper on the remaining results.

Academic Significance and Societal Importance of the Research Achievements

本研究により、脊髄損傷後の残存した筋活動依存的に損傷下の脊髄を電気刺激する筋ー脊髄間インターフェースは、脊髄損傷後の運動機能の回復に貢献することがわかった。またその背景には、損傷下の脊髄および損傷より上の一次運動野における可塑的な変化があることが明らかとなった。本手法は、脊髄損傷者の新たなリハビリテーションとして期待される。

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 2022 2021 2020

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

  • [Journal Article] Tuning of motor outputs produced by spinal stimulation during voluntary control of torque directions in monkeys2022

    • Author(s)
      Kaneshige Miki、Obara Kei、Suzuki Michiaki、Tazoe Toshiki、Nishimura Yukio
    • Journal Title

      eLife

      Volume: 11 Pages: 1-27

    • DOI

      10.7554/elife.78346

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Tuning of motor outputs produced by spinal stimulation during voluntary control of torque directions in monkeys2022

    • Author(s)
      Miki Kaneshige, Kei Obara, Michiaki Suzuki, Toshiki Tazoe, Yukio Nishimura
    • Journal Title

      bioRxiv

      Volume: -

    • DOI

      10.1101/2022.03.16.484577

    • Related Report
      2021 Research-status Report
    • Open Access
  • [Presentation] Enhanced spinal outputs are associated with compensatory changes in cell activities of monkey motor cortex through motor recovery after spinal cord injury2022

    • Author(s)
      Kaneshige M, Obara K, Suzuki M, Tazoe T, Nishimura Y.
    • Organizer
      第45回日本神経科学大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 脊髄損傷後の運動機能の回復過程において、増大した脊髄のアウトプットは、一次運動野神経細胞活動の変調の減少と関連する2022

    • Author(s)
      Kaneshige M, Obara K, Suzuki M, Tazoe T, Nishimura Y.
    • Organizer
      第16回Motor Control研究会
    • Related Report
      2022 Research-status Report
  • [Presentation] Boosting motor outputs and inducing cortical adaptation via artificial neural connection.2021

    • Author(s)
      Kaneshige M, Obara K, Suzuki M, Tazoe T, Nishimura Y.
    • Organizer
      第44回日本神経科学大会
    • Related Report
      2021 Research-status Report
  • [Presentation] Subdural spinal stimulation boosts voluntary muscle activity in monkeys2020

    • Author(s)
      Kaneshige M, Obara K, Suzuki M, Tazoe T, Nishimura Y.
    • Organizer
      第43 回日本神経科学大会
    • Related Report
      2020 Research-status Report
  • [Book] 生理学 第6版2023

    • Author(s)
      岡田 隆夫、鈴木 敦子、渡邉 マキノ
    • Total Pages
      280
    • Publisher
      医学書院
    • ISBN
      9784260053181
    • Related Report
      2023 Annual Research Report

URL: 

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

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