The Journal of Neuroscience, 2001, 21:RC155:1-5
RAPID COMMUNICATION
Differential Contributions of the Basolateral and Central
Amygdala in the Acquisition and Expression of Conditioned Relapse to
Cocaine-Seeking Behavior
Paul J.
Kruzich1 and
Ronald E.
See2
1 The Laboratory of the Biology of Addictive Diseases,
The Rockefeller University, New York, New York 10021, and
2 Department of Physiology and Neuroscience, Medical
University of South Carolina, Charleston, South Carolina 29425
The amygdala is known to be a critical mediator of emotional
learning in aversive and appetitive conditioning. Here we show for the
first time that distinct subregions of the amygdala play unique roles
in the acquisition and expression of cocaine-seeking behavior
maintained by drug-paired cues in a model of relapse. Reversible
inactivation of the basolateral amygdala with the sodium channel
blocker tetrodotoxin disrupted both the acquisition and expression of
the conditioned reinforcing effects maintained by drug-paired stimuli.
However, inactivation of the central amygdala disrupted only the
expression, but not the acquisition, of the conditioned reinforcing
effects of drug-paired stimuli. Our results demonstrate that these
nuclei participate as components of an amygdalar circuit to drive
cocaine-seeking behavior produced by stimulus-reinforcement associations.
Key words:
basolateral amygdala; central amygdala; cocaine; relapse; self-administration; reinforcement
Copyright © Society for Neuroscience 0270-6474//$05.00/0