Correspondence of cue activity to reward activity in the macaque orbitofrontal cortex

Takayuki Hosokawa, Keichiro Kato, Masato Inoue, Akichika Mikami

    Research output: Contribution to journalArticlepeer-review

    9 Citations (Scopus)

    Abstract

    It has been reported that neurons in the orbitofrontal cortex (OFC) respond to emotionally significant events such as reward-predicting cues and/or the reward itself. The responses to reward-predicting cues are considered to carry the information of the predicted reward. However, few studies have focused on the relationship of the neuronal activity during a cue period with that during a reward period. We can infer that the cue responses of OFC neurons are correlated to the reward responses if they carry the information of the predicted reward. In this study, we focused on neurons that showed responses during both the cue and reward periods, and compared the response characteristics between these periods. We found 94 of 369 OFC neurons showed significant responses during both the cue and reward periods, and 43 of which preserved their selectivity between these periods. Furthermore, population analysis showed that stronger cue responses corresponded to stronger reward responses, and stronger reward responses corresponded to stronger cue responses. These results suggest that individual neurons in the OFC associate visual information with reward information, and contribute to the prediction of future rewards by forming reward representations.

    Original languageEnglish
    Pages (from-to)146-151
    Number of pages6
    JournalNeuroscience Letters
    Volume389
    Issue number3
    DOIs
    Publication statusPublished - 2005 Dec 9

    Keywords

    • Monkey
    • Prediction
    • Reward representation
    • The orbitofrontal cortex
    • Visual information

    ASJC Scopus subject areas

    • Neuroscience(all)

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