Unbound MEDLINE

Neural mechanisms of foraging.

Abstract

Behavioral economic studies involving limited numbers of choices have provided key insights into neural decision-making mechanisms. By contrast, animals' foraging choices arise in the context of sequences of encounters with prey or food. On each encounter, the animal chooses whether to engage or, if the environment is sufficiently rich, to search elsewhere. The cost of foraging is also critical. We demonstrate that humans can alternate between two modes of choice, comparative decision-making and foraging, depending on distinct neural mechanisms in ventromedial prefrontal cortex (vmPFC) and anterior cingulate cortex (ACC) using distinct reference frames; in ACC, choice variables are represented in invariant reference to foraging or searching for alternatives. Whereas vmPFC encodes values of specific well-defined options, ACC encodes the average value of the foraging environment and cost of foraging.

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  • Authors

    Kolling N, Behrens TE, Mars RB, Rushworth MF

    Source

    Science (New York, N.Y.) 336:6077 2012 Apr 6 pg 95-8

    MeSH

    Adult
    Brain Mapping
    Choice Behavior
    Decision Making
    Female
    Gyrus Cinguli
    Humans
    Logistic Models
    Male
    Prefrontal Cortex
    Reward
    Young Adult

    Pub Type(s)

    Journal Article
    Research Support, Non-U.S. Gov't

    Language

    eng

    PubMed ID

    22491854