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Exploration of the higher-order somatosensory cortex

Research Project

Project/Area Number 21K19315
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 46:Neuroscience and related fields
Research InstitutionFujita Health University

Principal Investigator

Yamashita Takayuki  藤田医科大学, 医学部, 教授 (40466321)

Project Period (FY) 2021-07-09 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywords体性感覚 / マウス / 社会性行動 / 大脳皮質 / 高次機能 / 洞毛 / バレル皮質
Outline of Research at the Start

高等動物では、視覚や聴覚といった感覚は大脳皮質の一次感覚野に入力され、その後二次、三次とより高次の感覚野において階層的に処理されることはよく知られている。ところが、体性感覚については一次体性感覚野(S1)のすぐ外側に二次体性感覚野(S2)があるのみで、高次情報処理機構についての研究は遅れている。山下(研究代表)らは、以前の研究でS2以外にS1軸索末端が集積する多くの小領域があることを発見している。本研究では、これらの各小領域における体性感覚情報表現および生理機能を網羅的に解析し、新規な高次体性感覚野の発見につなげる。

Outline of Final Research Achievements

The neuronal mechanisms underlying the hierarchical information processing of somatosensation in the cerebral cortex remains largely unclear. In this study, we used mice to investigate the information processing mechanism in the dysgranular zone, which receives projections from the whisker primary somatosensory cortex. We found that neurons responding to the approach of another conspecific adult (a social approach stimulus) and the approach of a stuffed mouse toy (a non-social approach stimulus) were discovered in the dysgranular cortex. Furthermore, our findings suggested that the proportion of neurons differentiating between these two stimuli varied across subregions of the dysgranular cortex. However, these responses involved factors other than tactile stimuli, implying that the dysgranular cortex may be a higher-order cognitive region related to sociality rather than a higher-order somatosensory cortex.

Academic Significance and Societal Importance of the Research Achievements

本研究は、一次体性感覚野洞毛領域からの投射を受ける異顆粒帯において、特定の社会行動をエンコードするニューロンを発見した。これにより、感覚処理と社会行動が神経レベルでどのように統合されているかに関する新たな知見を提供した。特に、異顆粒帯内の亜領域において社会性行動の表現が異なるという発見は、今後の研究に重要な情報となるであろう。本研究成果は、将来的には自閉スペクトラム障害などの社会的障害の神経メカニズムの解明に寄与し、新たな診断ツールや治療戦略の開発に役立つ可能性がある。

Report

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

    (16 results)

All 2023 2022 2021 Other

All Int'l Joint Research (1 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (9 results) (of which Int'l Joint Research: 3 results,  Invited: 7 results) Remarks (4 results)

  • [Int'l Joint Research] スイス連邦工科大学ローザンヌ校(スイス)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Neural mechanisms underlying uninstructed orofacial movements during reward-based learning behaviors2023

    • Author(s)
      Li Wan-Ru、Nakano Takashi、Mizutani Kohta、Matsubara Takanori、Kawatani Masahiro、Mukai Yasutaka、Danjo Teruko、Ito Hikaru、Aizawa Hidenori、Yamanaka Akihiro、Petersen Carl C.H.、Yoshimoto Junichiro、Yamashita Takayuki
    • Journal Title

      Current Biology

      Volume: 33 Issue: 16 Pages: 3436-3451

    • DOI

      10.1016/j.cub.2023.07.013

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Interareal Synaptic Inputs Underlying Whisking-Related Activity in the Primary Somatosensory Barrel Cortex2023

    • Author(s)
      Kawatani Masahiro、Horio Kayo、Ohkuma Mahito、Li Wan-Ru、Yamashita Takayuki
    • Journal Title

      The Journal of Neuroscience

      Volume: 44 Issue: 4 Pages: e1148232023-e1148232023

    • DOI

      10.1523/jneurosci.1148-23.2023

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] How Rewards Influence Facial Movements in Mice2023

    • Author(s)
      Takayuki Yamashita
    • Organizer
      Fujita International Symposium on Brain science 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Uncovering the Neuronal Mechanisms of Uninstructed Orofacial Movements in Reward-Based Learning Behaviors2023

    • Author(s)
      Takayuki Yamashita
    • Organizer
      Bordeaux Neurocampus Seminar
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] The neural basis of reward-related facial movements and their impacts on sensory perception2023

    • Author(s)
      Takayuki Yamashita
    • Organizer
      Barrel cortex and beyond
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Reward-Related Orofacial Movements: Mechanisms and Influence on Cortical Activities2023

    • Author(s)
      山下 貴之
    • Organizer
      生理研シナプス研究会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] D1 receptor-dependent and -independent uninstructed orofacial movements during reward-based learning behaviors2023

    • Author(s)
      Wanru Li, Takashi Nakano, Takayuki Yamashita
    • Organizer
      NEURO2023 第46回日本神経科学大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 一次体性感覚野における運動に伴う神経活動は高次体性感覚野からのフィードバック入力により生じる2023

    • Author(s)
      河谷 昌泰、堀尾 佳世、リ ワンル、大熊 真人、山下 貴之
    • Organizer
      NEURO2023 第46回日本神経科学大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 報酬はどのように顔を動かすか2023

    • Author(s)
      山下貴之
    • Organizer
      定量生命科学研究所セミナー
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 報酬の予測と獲得に伴うマウスの表情を司る神経回路2022

    • Author(s)
      山下 貴之
    • Organizer
      第4回 これからの神経回路研究の会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 報酬の予測や獲得に伴うマウスの顔運動を制御する神経回路機構2021

    • Author(s)
      山下 貴之
    • Organizer
      生理研シナプス研究会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Remarks] 運動中に感覚が変化する脳メカニズムを解明

    • URL

      https://www.fujita-hu.ac.jp/news/j93sdv000000pr1m.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] Challenging the Traditional Views on ...

    • URL

      https://www.fujita-hu.ac.jp/en/news/kka9ar00000029xf.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] 報酬が表情を変化させる神経メカニズムを解明

    • URL

      https://www.fujita-hu.ac.jp/news/j93sdv000000l0gv.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] Unveiling the Mechanism Underlying ...

    • URL

      https://www.fujita-hu.ac.jp/en/news/kka9ar00000024tb.html

    • Related Report
      2023 Annual Research Report

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Published: 2021-07-13   Modified: 2025-01-30  

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