Motivational neural circuits underlying reinforcement learning

Bruno B. Averbeck, Vincent Costa

Research output: Contribution to journalReview article

35 Scopus citations

Abstract

Reinforcement learning (RL) is the behavioral process of learning the values of actions and objects. Most models of RL assume that the dopaminergic prediction error signal drives plasticity in frontal-striatal circuits. The striatum then encodes value representations that drive decision processes. However, the amygdala has also been shown to play an important role in forming Pavlovian stimulus-outcome associations. These Pavlovian associations can drive motivated behavior via the amygdala projections to the ventral striatum or the ventral tegmental area. The amygdala may, therefore, play a central role in RL. Here we compare the contributions of the amygdala and the striatum to RL and show that both the amygdala and striatum learn and represent expected values in RL tasks. Furthermore, value representations in the striatum may be inherited, to some extent, from the amygdala. The striatum may, therefore, play less of a primary role in learning stimulus-outcome associations in RL than previously suggested.

Original languageEnglish (US)
Pages (from-to)505-512
Number of pages8
JournalNature Neuroscience
Volume20
Issue number4
DOIs
StatePublished - Mar 29 2017
Externally publishedYes

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ASJC Scopus subject areas

  • Neuroscience(all)

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