Abstract
State-dependent value representation: evidence from the striatum.
Highlights
Unlike appetitive sucrose, aversive sucrose reduced accumbens dopamine concentration compared to baseline, even though the sensory properties of the sucrose were held constant in the two conditions
Porcelli and colleagues investigated the flexibility of reward processing in response to induced stress
If stress causes a desensitization to reward in the “actor” areas of the striatum, action-outcome contingencies may not be processed accurately enough to guide future choices, forcing the organism to rely on more habitual responses
Summary
Acute stress influences neural circuits of reward processing by Porcelli, A. In order to adaptively determine the value of different actions, organisms need to take external as well as internal states into account (e.g., Rangel et al, 2008). This pattern of behavior is compatible with the notion that state information can have such a profound impact on value computation that a previously bad option becomes good (Dayan and Berridge, 2014).
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