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Involvement of dopaminergic neurons in motor function

Research Project

Project/Area Number 19K19937
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 59010:Rehabilitation science-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Kunori Nobuo  国立研究開発法人産業技術総合研究所, 情報・人間工学領域, 研究員 (10761299)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords腹側被蓋野 / ファイバーフォトメトリー / 神経活動 / リーチング / げっ歯類 / イメージング / リハビリテーション / 脳損傷 / ラット / 電気刺激 / ドーパミン神経 / 脳血管障害 / 光学イメージング / モデル動物 / ドーパミン / 脳卒中 / in vivo / 経頭蓋電気刺激 / 脳活動 / 脳卒中モデル / 光イメージング / 中脳ドーパミン神経
Outline of Research at the Start

脳梗塞を始めとする脳血管障害では、損傷が生じた脳領域に応じて認知・運動機能障害が生じる。本研究では、運動機能向上に不可欠とされる「中脳-運動関連皮質ドーパミン神経回路」に着目し、本神経回路の活性化が脳梗塞後の運動機能回復に与える影響を明らかにすることを目指す。脳梗塞モデル動物の運動機能回復過程における本神経回路の活動様式を明らかにするとともに、その活動様式に基づく神経回路の活性化が運動機能回復の促進に寄与するかどうかを検証する。以上を通じて、ドーパミン神経回路を利用した新たな運動機能回復促進技術の開発に資する基礎的な知見を得ることを目指す。

Outline of Final Research Achievements

The purpose of this study is to reveal the activity patterns of the midbrain dopaminergic neurons during exercise to obtain knowledge contributing to the technology for improving motor function. For this purpose, the activity patterns of the ventral midbrain, including dopaminergic neurons, were measured during motor tasks. In addition, we placed stimulating electrodes in the ventral midbrain and verified the effects of electrical stimulation on motor performance. The results showed that neurons in the ventral midbrain were transiently activated by changes in the external environment during the motor task. In addition, the activation by the electrical stimulation transiently improved the motor performance. These findings may lead to the development of techniques to improve motor recovery after stroke.

Academic Significance and Societal Importance of the Research Achievements

中脳ドーパミン神経は運動学習などとの関係が知られており、運動機能障害を呈する脳卒中患者等の治療標的として着目されている。しかしながら、運動課題中の活動様式は十分には明らかになっておらず、どのようなタイミングで活性化することが有効なのかは不明であった。本研究では、げっ歯類を対象とした実験により、その活動様式を明らかにしたものであり、学術的に有用であるだけでなく、ドーパミン神経を標的とした新たな脳活性化技術の開発につながることが期待される。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (18 results)

All 2023 2022 2021 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (15 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Journal Article] Cortical direct current stimulation improves signal transmission between the motor cortices of rats2021

    • Author(s)
      Kunori Nobuo、Takashima Ichiro
    • Journal Title

      Neuroscience Letters

      Volume: 741 Pages: 135492-135492

    • DOI

      10.1016/j.neulet.2020.135492

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Evaluation of acute anodal direct current stimulation-induced effects on somatosensory-evoked responses in the rat2019

    • Author(s)
      Kunori Nobuo、Takashima Ichiro
    • Journal Title

      Brain Research

      Volume: 1720 Pages: 146318-146318

    • DOI

      10.1016/j.brainres.2019.146318

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] An Implantable Cranial Window Using a Collagen Membrane for Chronic Voltage-Sensitive Dye Imaging2019

    • Author(s)
      Kunori Nobuo、Takashima Ichiro
    • Journal Title

      Micromachines

      Volume: 10 Issue: 11 Pages: 789-789

    • DOI

      10.3390/mi10110789

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Connectome changes relating to motor improvement in cerebral palsy2023

    • Author(s)
      Taichi Goto, Yuji Komaki, Tomokazu Tsurugizawa, Sunao Iwaki, Ichiro Takashima, Nobuo Kunori
    • Organizer
      第100回日本生理学会大会
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 脳性麻痺モデル動物における運動機能回復と脳内の神経ネットワーク変化2022

    • Author(s)
      Taichi Goto, Yuji Komaki, Tomokazu Tsurugizawa, Sunao Iwaki, Ichiro Takashima, Nobuo Kunori
    • Organizer
      脳機能とリハビリテーション研究会学術集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 低酸素虚血性脳症モデルラットにおける運動トレーニング効果の検証2022

    • Author(s)
      後藤太一、高島一郎、九里信夫
    • Organizer
      第8回日本小児理学療法学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Connectome changes contributing to motor improvements in cerebral palsy2022

    • Author(s)
      Taichi Goto, Yuji Komaki, Tomokazu Tsurugizawa, Ichiro Takashima, Nobuo Kunori
    • Organizer
      JANUBET
    • Related Report
      2022 Annual Research Report
  • [Presentation] Connectome changes associated with whole-body exercise in cerebral palsy animal model2022

    • Author(s)
      Taichi Goto, Yuji Komaki, Tomokazu Tsurugizawa, Ichiro Takashima, Nobuo Kunori
    • Organizer
      NEURO2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Neural network changes associated with training exercise in a hypoxic ischemic rat model2022

    • Author(s)
      Taichi Goto, Yuji Komaki, Tomokazu Tsurugizawa, Ichiro Takashima, Nobuo Kunori
    • Organizer
      第99回日本生理学会大会
    • Related Report
      2021 Research-status Report
  • [Presentation] The effect of transcranial direct current stimulation on recovery of forelimb motor function in a rat model of Parkinson's disease2021

    • Author(s)
      Ryota Tamura, Shinnosuke Dezawa, Jyunpei Kato, Mariko Nakata, Nobuo Kunori, Ichiro Takashima
    • Organizer
      SICE LE2021
    • Related Report
      2021 Research-status Report
  • [Presentation] The effect of DC stimulation on cortico-cortical transmission2021

    • Author(s)
      Nobuo Kunori
    • Organizer
      SICE LE2021
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 低酸素虚血性脳症モデルラットにおける運動トレーニング効果の検証2021

    • Author(s)
      後藤太一、高島一郎、九里信夫
    • Organizer
      第8回日本小児理学療法学会
    • Related Report
      2021 Research-status Report
  • [Presentation] Neonatal hypoxic-ischemic brain injury causes motor dysfunctions2021

    • Author(s)
      Taichi Goto, Ichiro Takashima, Nobuo Kunori
    • Organizer
      NEURO2021
    • Related Report
      2021 Research-status Report
  • [Presentation] 腹側被蓋野ニューロンによる運動調節機構の解明2021

    • Author(s)
      九里信夫
    • Organizer
      第98回日本生理学会大会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Neuronal activity in ventral tegmental area during reaching task in rats2021

    • Author(s)
      後藤太一、高島一郎、九里信夫
    • Organizer
      第98回日本生理学会大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Neuronal activity of the ventral tegmental area during the sensorimotor tasks2020

    • Author(s)
      Noguo Kunori, Ryota Tamura, Shinnosuke Dezawa, Ichiro Takashima
    • Organizer
      FENS2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] An imprantable cranial window using a collagen membrane for chronic voltage-sensitive dye imaging2019

    • Author(s)
      Nobuo Kunori, Ichiro Takashima
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Effect of transcranial direct current stimulation to M1 on subcortical neural activity2019

    • Author(s)
      Ryota Tamura, obuo Kunori, Ichiro Takashima
    • Organizer
      第97回日本生理学会大会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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