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Theberge, Florence R. M.; Milton, Amy L.; Belin, David; Lee, Jonathan L. C.; Everitt, Barry J. – Learning & Memory, 2010
A distributed limbic-corticostriatal circuitry is implicated in cue-induced drug craving and relapse. Exposure to drug-paired cues not only precipitates relapse, but also triggers the reactivation and reconsolidation of the cue-drug memory. However, the limbic cortical-striatal circuitry underlying drug memory reconsolidation is unclear. The aim…
Descriptors: Cues, Cocaine, Symptoms (Individual Disorders), Classical Conditioning
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Bradfield, Laura A.; McNally, Gavan P. – Learning & Memory, 2010
We studied the role of nucleus accumbens shell (AcbSh) in Pavlovian fear conditioning. Rats were trained to fear conditioned stimulus A (CSA) in Stage I, which was then presented in compound with a neutral stimulus and paired with shock in Stage II. AcbSh lesions had no effect on fear-learning to CSA in Stage I, but selectively prevented learning…
Descriptors: Stimuli, Classical Conditioning, Fear, Child Development
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Calandreau, Ludovic; Jaffard, Robert; Desmedt, Aline – Learning & Memory, 2007
Extensive evidence indicates that the septum plays a predominant role in fear learning, yet the direction of this control is still a matter of debate. Increasing data suggest that the medial (MS) and lateral septum (LS) would be differentially required in fear conditioning depending on whether a discrete conditional stimulus (CS) predicts, or not,…
Descriptors: Cues, Fear, Classical Conditioning, Context Effect
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Cheng, Jingjun; Feenstra, Matthijs G. P. – Learning & Memory, 2006
Combined activation of dopamine D1- and NMDA-glutamate receptors in the nucleus accumbens has been strongly implicated in instrumental learning, the process in which an individual learns that a specific action has a wanted outcome. To assess dopaminergic activity, we presented rats with two sessions (30 trials each) of a one-lever appetitive…
Descriptors: Rewards, Biochemistry, Nonverbal Learning, Animals
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Bouton, Mark E. – Learning & Memory, 2004
This article provides a selective review and integration of the behavioral literature on Pavlovian extinction. The first part reviews evidence that extinction does not destroy the original learning, but instead generates new learning that is especially context-dependent. The second part examines insights provided by research on several related…
Descriptors: Reinforcement, Expectation, Inhibition, Generalization