Reward salience but not spatial attention dominates the value representation in the orbitofrontal cortex

Wenyi Zhang, Yang Xie and Tianming Yang ()
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Wenyi Zhang: Chinese Academy of Sciences
Yang Xie: Chinese Academy of Sciences
Tianming Yang: Chinese Academy of Sciences

Nature Communications, 2022, vol. 13, issue 1, 1-12

Abstract: Abstract The orbitofrontal cortex (OFC) encodes value and plays a key role in value-based decision-making. However, the attentional modulation of the OFC’s value encoding is poorly understood. We trained two monkeys to detect a luminance change at a cued location between a pair of visual stimuli, which were over-trained pictures associated with different amounts of juice reward and, thus, different reward salience. Both the monkeys’ behavior and the dorsolateral prefrontal cortex neuronal activities indicated that the monkeys actively directed their spatial attention toward the cued stimulus during the task. However, the OFC’s neuronal responses were dominated by the stimulus with higher reward salience and encoded its value. The value of the less salient stimulus was only weakly represented regardless of spatial attention. The results demonstrate that reward and spatial attention are distinctly represented in the prefrontal cortex and the OFC maintains a stable representation of reward salience minimally affected by attention.

Date: 2022
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DOI: 10.1038/s41467-022-34084-0

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