2017 Fiscal Year Final Research Report
Brain Mechanisms of Foraging Behavior: Studies on Decision-making based on Multiple Values
| Project/Area Number |
25291071
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Animal physiology/Animal behavior
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
HOMMA KOICHI 帝京大学, 薬学部, 教授 (90251438)
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| Project Period (FY) |
2013-04-01 – 2018-03-31
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| Keywords | 最適性 / 意思決定 / 社会的採餌行動 / 衝動性 / 労働投資 / 大脳基底核 / 扁桃体 / 集合知 |
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| Outline of Final Research Achievements |
Neuroeconomical studies were performed using newly hatched domestic chicks. We have so far found that competition makes chicks impulsive. In this study, by focusing on basal ganglia and amygdala-homologous area, we analyzed how the multiple values (such as amount, proximity, cost, risk and public information) could determines decisions. As the results, we found (1) competition suppresses the neural representation of reward by associated visual cues, (2) chicks pay more effort under competition (social facilitation), which was not mediated by reward system (dopaminergic neurons) but by emotion system (limbic amygdala), (3) risk meets competition to yield choice impulsiveness, and (4) competition leads to formation of publicly shared information about the food resource, thus giving rise to optimal foraging of the group.
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| Free Research Field |
神経行動学
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