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New clue to cocaine addicts' quirky behavior

e significantly less able to change strategies when they were required to ignore the cue and always make a left or right turn to receive the reward.

"Thus, although abnormally induced LTP by psychostimulants at limbic inputs might not interfere with learning a response strategy, it may reduce the capacity of these animals to consider alternate response strategies," concluded Goto and Grace. "In this way, the disruption of synaptic plasticity by cocaine sensitization may contribute to the affective- and context-inappropriate impulsive behaviors that are characteristic of drug addiction."

This work was supported by USPHS and National Alliance for Research on Schizophrenia and Depression Young Investigator Award. Y.G. is NARSAD Essel Investigator.

Goto and Grace: "Dopamine-dependent Interactions between Limbic and Prefrontal Cortical Plasticity in the Nucleus Accumbens: Disruption by Cocaine Sensitization" Publishing in Neuron, Vol. 47, July 21, 2005, pages 255?66. DOI 10.1016/j.neuron.2005.06.017. www.neuron.org


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Source:Cell Press


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