88 results found
    1. Neuroscience

    How prior preferences determine decision-making frames and biases in the human brain

    Alizée Lopez-Persem, Philippe Domenech, Mathias Pessiglione
    Model-based analyses of choice behavior and fMRI activity revealed that prior preferences generate default policies, which frame the decision value signal encoded in the vmPFC, and shift vmPFC pre-choice activity so as to induce a decision bias toward default options.
    1. Computational and Systems Biology
    2. Neuroscience

    Dopamine role in learning and action inference

    Rafal Bogacz
    A mathematical model describes the function of dopaminergic neurons in both learning and action planning.
    1. Neuroscience

    Neuronal origins of reduced accuracy and biases in economic choices under sequential offers

    Weikang Shi, Sebastien Ballesta, Camillo Padoa-Schioppa
    Neuronal activity in the primate orbitofrontal cortex reveals different choice biases observed when offers are presented sequentially originate at different stages of the decision process.
    1. Computational and Systems Biology

    The functional form of value normalization in human reinforcement learning

    Sophie Bavard, Stefano Palminteri
    Challenging a popular theory in neuroeconomics, a computational cognitive study provides evidence against divisive normalization, a supposedly canonical neural computation, in favor of an alternative account, range normalization, in the context of value learning.
    1. Neuroscience

    Amphetamine reduces reward encoding and stabilizes neural dynamics in rat anterior cingulate cortex

    Saeedeh Hashemnia, David R Euston, Aaron J Gruber
    Amphetamine reduces reward signaling by neurons in rat prefrontal cortex, but increases the stability of population dynamics, which account for animals’ increased task engagement, despite reduced reward motivation.
    1. Neuroscience

    Different brain systems support learning from received and avoided pain during human pain-avoidance learning

    Marieke Jepma, Mathieu Roy ... Albert Dahan
    Pharmacological fMRI study provides evidence that learning from the unexpected presence and absence of pain is mediated by different brain systems.
    1. Neuroscience

    The nematode worm C. elegans chooses between bacterial foods as if maximizing economic utility

    Abraham Katzen, Hui-Kuan Chung ... Shawn R Lockery
    A worm with a nervous system of only 302 neurons satisfies the necessary and sufficient conditions for value-based decision making.
    1. Chromosomes and Gene Expression

    Serotonin signaling mediates protein valuation and aging

    Jennifer Ro, Gloria Pak ... Scott D Pletcher
    Serotonin modulates diet-dependent lifespan in flies.
    1. Neuroscience

    Insulin sensitivity in mesolimbic pathways predicts and improves with weight loss in older dieters

    Lena J Tiedemann, Sebastian M Meyhöfer ... Stefanie Brassen
    Insulinergic neuromodulation of hedonic food processing predicts future weight management and improves with weight loss in older overweight dieters.
    1. Neuroscience

    Value signals guide abstraction during learning

    Aurelio Cortese, Asuka Yamamoto ... Benedetto De Martino
    Valuation of sensory information in the ventromedial prefrontal cortex plays a key function in constructing the abstract representations that guide complex behaviours.

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