2011 Fiscal Year Final Research Report
Positive and negative reward coding by serotonin, acetylcholine, and dopamine network.
Project/Area Number |
20300139
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Single-year Grants |
Section | 一般 |
Research Field |
Neurophysiology and muscle physiology
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Research Institution | Kansai Medical University |
Principal Investigator |
NAKAMURA Kae 関西医科大学, 医学部, 教授 (40454607)
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Co-Investigator(Kenkyū-buntansha) |
KOBAYASHI Yasushi 大阪大学, 生命機能研究科, 准教授 (60311198)
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Project Period (FY) |
2008 – 2011
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Keywords | ドパミン / セロトニン / アセチルコリン / 強化学習 / 報酬 |
Research Abstract |
The strength of firing of midbrain dopaminergic neurons has been revealed that it carries reward prediction error signal in the framework of reinforcement learning where an agent chooses actions to maximize rewards. The dopamine neurons receive inputs from the pedunculopontine tegmental nucleus(PPTN), where many cholinergic neurons exist, and the dorsal raphe nucleus(DRN), where many serotonergic neurons exist. Thus we measured single neuronal activity of PPTN and DRN while monkeys performed eye movement tasks to obtain reward of different values and the Pavlovian conditioning task in which appetitive and aversive events were imposed. We found that while different PPTN neurons encoded predicted reward and actual rewards separately, DRN neurons often carried predicted and actual rewards by single neurons. Such different reward signals may be fed and integrated in the dopamine neurons to compute reward prediction error signal, which is used for the control of action and decision making.
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[Journal Article] Cerebromalacia with epilepsy and cortical blindness in a laboratory Japanese macaque2010
Author(s)
Yoshizawa, K., Nakao, K., Habiro, M., Hayashi, K., Kuwata, M., Uehara, N., Takashi, Y., Nakamura, K., Tsubura, A.
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Journal Title
Toxicologic Pathology
Volume: 38(7)
Pages: 1058-1063
Peer Reviewed
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[Presentation] Neural processing of appetitive and aversive stimuli in the primate dorsal raphe nucleus2010
Author(s)
Hayashi, K., Nakao, K., Okada, K., Kobayashi, Y., Nakamura, K.
Organizer
Society for Neuroscience Meeting
Place of Presentation
San Diego Convention Center(San Diego, USA)
Year and Date
2010-11-15
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[Presentation] Positive and negative value coding in the primate dorsal raphe nucleus2009
Author(s)
Nakamura, K., Kobayashi, Y., Okada, O., Noritake, A., Matsuzaki, R., Nakao, K.
Organizer
Society for Neuroscience
Place of Presentation
McCormick Place(Chicago, USA)
Year and Date
2009-10-20
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