VUMC Main Calendar Events

  • 4/2/2018
    4:10 pm - 5:00 pm
    Departrment of Psychology Colloquium Series

    Department of Psychology Colloquium Series presents

    Bruno Averbeck, Ph.D.              

    Chief

    Section on Learning and Decision Making (SLDM)

    National Institute of Mental Health

    https://www.nimh.nih.gov/labs-at-nimh/principal-investigators/bruno-averbeck.shtml

    Neural systems underlying reinforcement learning

    Reinforcement learning (RL) is the behavioral process of learning the values of actions and objects. Most models of RL assume that the dopaminergic prediction error signal drives plasticity in frontal-striatal circuits. The striatum then codes value representations that drive decision processes. The amygdala is not considered a core component of the RL circuitry. However, we have recently found that the amygdala plays a key role in RL. In addition, we have found that the ventral-striatum (VS) plays a more restricted role than often thought. Specifically, we have found that the VS is involved in learning stimulus-outcome associations, but not action-outcome associations. The VS is also not involved in learning about losses. Across our studies, we are defining a broader circuitry that underlies RL and characterizing the specific contributions of the nodes in the circuit.

     

    Monday, April 2nd, 2018

    4:10pm

    103 Wilson Hall

    Contact: Jennifer Lass


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