Neuronal activity in dorsomedial and dorsolateral striatum under the requirement for temporal credit assignment

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To investigate neural processes underlying temporal credit assignment in the striatum, we recorded neuronal activity in the dorsomedial and dorsolateral striatum (DMS and DLS, respectively) of rats performing a dynamic foraging task in which a choice has to be remembered until its outcome is revealed for correct credit assignment. Choice signals appeared sequentially, initially in the DMS and then in the DLS, and they were combined with action value and reward signals in the DLS when choice outcome was revealed. Unlike in conventional dynamic foraging tasks, neural signals for chosen value were elevated in neither brain structure. These results suggest that dynamics of striatal neural signals related to evaluating choice outcome might differ drastically depending on the requirement for temporal credit assignment. In a behavioral context requiring temporal credit assignment, the DLS, but not the DMS, might be in charge of updating the value of chosen action by integrating choice, action value, and reward signals together
Publisher
NATURE PUBLISHING GROUP
Issue Date
2016-06
Language
English
Article Type
Article
Keywords

MEDIAL PREFRONTAL CORTEX; BASAL GANGLIA CIRCUITS; DECISION-MAKING; DORSAL STRIATUM; NAVIGATION STRATEGIES; ACTION SELECTION; REWARD SIGNALS; MODEL; REINFORCEMENT; LOOPS

Citation

SCIENTIFIC REPORTS, v.6

ISSN
2045-2322
DOI
10.1038/srep27056
URI
http://hdl.handle.net/10203/209998
Appears in Collection
BS-Journal Papers(저널논문)
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