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2020 Fiscal Year Final Research Report

Neural circuit mechanisms for regulation of social conflicts

Research Project

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Project/Area Number 16H06317
Research Category

Grant-in-Aid for Scientific Research (S)

Allocation TypeSingle-year Grants
Research Field Basic / Social brain science
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Okamoto Hitoshi  国立研究開発法人理化学研究所, 脳神経科学研究センター, チームリーダー (40183769)

Project Period (FY) 2016-05-31 – 2021-03-31
Keywords手綱核 / 脚間核 / 社会的闘争 / ゼブラフィッシュ / マウス
Outline of Final Research Achievements

The habenula is among the evolutionarily most conserved parts of the brain and has been known for its role in the control of behavior to cope with aversive stimuli. Recent studies in zebrafish have revealed the novel roles of the two parallel neural pathways from the dorsal habenula to its target, the interpeduncular nucleus, in the control of behavioral choice whether to behave dominantly or submissively in the social conflict. They are modifiable depending on the internal state of the fish such as hunger and play another important role in orientation of attention whether to direct it internally to oneself or externally to others. These studies, therefore, are revealing a novel role for the habenula as the integrated switchboard for concertedly controlling behavior either as a winner with self-centered (idiothetic) attention or a loser with others-oriented (allothetic) attention.

Free Research Field

神経科学

Academic Significance and Societal Importance of the Research Achievements

闘争による社会的上下関係の決定は、動物だけで無く、人間でも見られる過程である。また、敗者が、敗北の記憶によって敗者となり続けるという現象は、人間の社会的振る舞いでも共通してみられる。この様な行動の脳科学的解明は、極めて社会的意義が大きい。また、社会的引きこもり等の治療などにも、研究の成果が利用される可能背が高い。また、いわゆるハングリー精神と言われる、闘争をあきらめない心の仕組みの一端を明らかにしたことは、社会的にも大きな関心を呼んだ。さらに、手綱核から脚間核への2本の神経経路が、動物が注意を外界と内面のどちらに向けるかのスイッチとして働く可能性は、今後の注意研究への重要な足がかりとなる。

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Published: 2022-01-27  

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