Distinct temporal difference error signals in dopamine axons in three regions of the striatum in a decision-making task.

ABSTRACT: Different regions of the striatum regulate different types of behavior. However, how dopamine signals differ across striatal regions and how dopamine regulates different behaviors remain unclear. Here, we compared dopamine axon activity in the ventral, dorsomedial, and dorsolateral striatum, while mice performed a perceptual and value-based decision task. Surprisingly, dopamine axon activity was similar across all three areas. At a glance, the activity multiplexed different variables such as stimulus-associated values, confidence, and reward feedback at different phases of the task. Our modeling demonstrates, however, that these modulations can be inclusively explained by moment-by-moment changes in the expected reward, that is the temporal difference error. A major difference between area

SUBMITTER: Tsutsui-Kimura I 

PROVIDER: S-EPMC7771962 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature