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Neural mechanisms for reward-risk integration

Research Project

Project/Area Number 19K21209
Project/Area Number (Other) 18H06086 (2018)
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund (2019)
Single-year Grants (2018)
Review Section 0704:Neuroscience, brain sciences, and related fields
Research InstitutionKyoto University

Principal Investigator

Sasaki Ryo  京都大学, 医学研究科, 助教 (70817931)

Project Period (FY) 2018-08-24 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords意思決定 / 腹外側前頭前野 / 腹側被蓋野 / マカクサル / 報酬とリスク / デコーディング解析 / 前頭前野 / ポピュレーションデコーディング / ギャンブル依存 / ドーパミン
Outline of Research at the Start

近年、精神疾患の病因の理解と治療法の確立が急務とされている。精神疾患の主たる症候のひとつである意思決定機構の障害の原因解明に対する社会的要請は高く、世界中で盛んに研究が進められている。本研究では、ヒトの柔軟な意思決定の基盤を、非ヒト科霊長類を用いて、心理行動学的、生理学的、計算論的な側面から、統合的・網羅的に解明する。

Outline of Final Research Achievements

We investigated the causal role of a variety of brain areas in the behavioral choices by reversible inactivation with microinjection of a GABAA receptor agonist, muscimol. We were careful to identify the target area and successfully localized it using MRI image injecting the gadolinium in advance. When muscimol was injected into bilateral ventrolateral prefrontal cortex (vlPFC) while the monkey was performing the task, the sensitivity to risky choice was gradually weakened over time, although the sensitivity to expected value was remained to be consistent. Interestingly, the interaction between risk and expected value was also weakened. Our results suggest that the integration of risk/return and expected value might be accomplished in vlPFC. We will also discuss about the role of the other brain areas such as Orbitofrontal cortex (OFC), Nucleus accumbens (NAc) and Anterior cingulate cortex (ACC). We also started the recording experiment from vlPFC.

Academic Significance and Societal Importance of the Research Achievements

同一の課題を用いてマカクザルの腹側前頭前野(vlPFC)に、眼窩前頭皮質(OFC)、腹側被蓋野(VTA)など複数の脳領野の機能を検討し、さらにこれら複数領野から神経活動を同時記録し、複数領野多数ニューロン活動から直接的にサルの意思決定を推定することで複数の脳領野間のネットワークとしての役割を明らかになってきた点が意義深い。また、計算論的手法の切り口を組み合わせることで、新たな手法が確立すれば、巨大脳における全脳ネットワークの可視化を一気に加速でき創造性が高い。その結果、精神疾患の患者やギャンブル依存の患者の治療法に関する理解がより一層進み、革新的な医療応用につながることが期待される。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • Research Products

    (4 results)

All 2020 2019

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

  • [Journal Article] Flexible coding of object motion in multiple reference frames by parietal cortex neurons2020

    • Author(s)
      Ryo Sasaki1*, Akiyuki Anzai1, Dora E. Angelaki2 and Gregory C. DeAngelis1
    • Journal Title

      Nature Neuroscience

      Volume: -

    • NAID

      120006878528

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Ventrolateral prefrontal cortex is causally involved in integration of expected value in risky choice2019

    • Author(s)
      R. SASAKI1, T. Takakuwa1, T. Isa
    • Organizer
      日本神経科学学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Causal role for involving expected value in risky choice in macaque ventrolateral prefrontal cortex2019

    • Author(s)
      R. SASAKI1, N. Takakuwa1, T. Isa
    • Organizer
      北米神経科学学会
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] リスク選択における報酬期待の統合処理に関与するサル腹外側前頭前野の因果的役割2019

    • Author(s)
      玉木 佑季、 佐々木 亮、高桑 徳宏、伊佐 正
    • Organizer
      日本生理学会
    • Related Report
      2019 Annual Research Report

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Published: 2018-08-27   Modified: 2024-03-26  

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