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Effects of projection circuits from motor cortex to somatosensory cortex on pain reduction

Research Project

Project/Area Number 21K07285
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 51030:Pathophysiologic neuroscience-related
Research InstitutionDoshisha University (2022-2023)
Tokyo Women's Medical University (2021)

Principal Investigator

Osaki Hironobu  同志社大学, 研究開発推進機構, 准教授 (30747697)

Project Period (FY) 2021-04-01 – 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 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords運動 / 痛み / 運動野 / 体性感覚野 / 痛覚 / 大脳皮質
Outline of Research at the Start

痛みは脳内の神経活動で生み出され、様々な領域の神経活動により増強・減弱されうる。大脳皮質運動野の活動は、従来から「痛み」に影響することが知られており、様々な刺激療法が慢性疼痛等の治療に行われてきた。しかし、大脳皮質運動野の活動が脳内のどの部位の活動をどのように制御し、鎮痛効果をもたらすのか十分分かっていない。そこで本研究では、大脳皮質運動野と体性感覚野との相互ネットワークに着目し、「痛みの感覚成分」である痛覚が運動野の神経活動によってどのように修飾されているのかを電気生理学的手法および行動実験により調べ、さらに、神経因性疼痛・慢性疼痛治療に対する効果的な運動野刺激方法を開発することを目指す。

Outline of Final Research Achievements

In the somatosensory cortex, nociceptive information, which is the sensory component of pain with information about "where" and "how" the body hurts, is primarily processed in the region that is distinct from tactile information. In rodent mice, we reported that tactile information is mainly processed in the granular area of the somatosensory cortex. Conversely, nociceptive information is processed in the dysgranular region, characterized by a reduced thickness of layer 4. Furthermore, the dysgranular region plays a crucial role in inducing escape behaviors based on pain sensation. To further investigate the interaction with motor information, we developed a calcium imaging system that allow us to observe cortical activity extensively during locomotion in rodent mice. Using this system, we successfully captured activity motor-related neural activity in the motor and somatosensory cortices during locomotion.

Academic Significance and Societal Importance of the Research Achievements

痛みは身体に生じた損傷等を知らせるシグナルの役割を担っている。しかし、痛みは脳内の様々な領域で処理され、各領域において修飾され、痛みとして表出するため、痛みの程度は損傷の程度と必ずしも一致しない。本研究では、痛みが体性感覚野のどの部位で選択的に処理され、逃避行動の誘発に関与するのかを示し、さらに運動による除痛効果の解明に不可欠な新たな行動観察システムを構築し実用化した。本システムを用いて、運動中の神経活動を広範囲に観察可能となったことにより、痛みが運動中にどのように修飾されうるのかを詳細に観察でき、今後、運動と痛みの関連の解明に役立つことが期待される。

Report

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

    (6 results)

All 2024 2023 2022 2021

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

  • [Journal Article] Distinct nociception processing in the dysgranular and barrel regions of the mouse somatosensory cortex2022

    • Author(s)
      Osaki H, Kanaya M, Ueta Y, Miyata M.
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 3622-3622

    • DOI

      10.1038/s41467-022-31272-w

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Distinct nociresponsive region in mouse primary somatosensory cortex2021

    • Author(s)
      Hironobu Osaki, Moeko Kanaya, Yoshifumi Ueta, Mariko Miyata
    • Journal Title

      bioRxiv

      Volume: ePub

    • DOI

      10.1101/2021.04.14.439725

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] A novel rotating ladder running task apparatus for assessment of motor paralysis and neural activity after motor cortex infarction of mice2024

    • Author(s)
      Hironobu Osaki, Daisuke Ishii, Yoshito Masamizu
    • Organizer
      第101回日本生理学会大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] A Systematic Approach to Monitoring Mouse Locomotion and Neural Activity After Motor Cortex Infarction2023

    • Author(s)
      Hironobu Osaki, Daisuke Ishii
    • Organizer
      The 2nd International Symposium, HypAd2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 感覚・運動介入による超適応の誘導2023

    • Author(s)
      尾崎弘展
    • Organizer
      生理学会第100回記念大会
    • Related Report
      2022 Research-status Report
  • [Presentation] Optogenetic inhibition of the primary somatosensory cortex neurons reduces pain behavior in free-moving mice2021

    • Author(s)
      Hironobu Osaki, Moeko Kanaya, and Mariko Miyata
    • Organizer
      1st International Symposium on Hyper-Adaptability
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

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