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Discrete coding of stimulus value, reward expectation, and reward prediction error in the dorsal striatum


Oyama, Kei; Tateyama, Yukina; Hernadi, Istvan; Tobler, Philippe N; Iijima, Toshio; Tsutsui, Ken-Ichiro (2015). Discrete coding of stimulus value, reward expectation, and reward prediction error in the dorsal striatum. Journal of Neurophysiology:jn.00097.2015.

Abstract

To investigate how the striatum integrates sensory information with reward information for behavioral guidance, we recorded single-unit activity in the dorsal striatum of head-fixed rats participating in a probabilistic Pavlovian conditioning task with auditory conditioned stimuli (CSs) in which reward probability was fixed for each CS but parametrically varied across CSs. We found that the activity of many neurons was linearly correlated with the reward probability indicated by the CSs. The recorded neurons could be classified according to their firing patterns into functional subtypes coding reward probability in different forms, such as stimulus value, reward expectation, and reward prediction error. These results suggest that several functional subgroups of dorsal striatal neurons represent different kinds of information formed through extensive prior exposure to CS-reward contingencies.

Abstract

To investigate how the striatum integrates sensory information with reward information for behavioral guidance, we recorded single-unit activity in the dorsal striatum of head-fixed rats participating in a probabilistic Pavlovian conditioning task with auditory conditioned stimuli (CSs) in which reward probability was fixed for each CS but parametrically varied across CSs. We found that the activity of many neurons was linearly correlated with the reward probability indicated by the CSs. The recorded neurons could be classified according to their firing patterns into functional subtypes coding reward probability in different forms, such as stimulus value, reward expectation, and reward prediction error. These results suggest that several functional subgroups of dorsal striatal neurons represent different kinds of information formed through extensive prior exposure to CS-reward contingencies.

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3 citations in Web of Science®
3 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:03 Faculty of Economics > Department of Economics
Dewey Decimal Classification:330 Economics
Language:English
Date:2015
Deposited On:04 Nov 2015 16:54
Last Modified:05 Apr 2016 19:29
Publisher:American Physiological Society
ISSN:0022-3077
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1152/jn.00097.2015

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