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Updated: Jul 15, 2026
Extinction Training During the Reconsolidation Window Prevents Recovery of Fear
Published on: August 24, 2012
Post-training reversible inactivation of the rat's basolateral amygdala interferes with hippocampus-dependent place
Abbas Ali Vafaei1, Karel Jezek, Jan Bures
1Laboratory of Learning and Memory, Department and Research Center of Physiology, Faculty of Medicine, Semnan University of Medical Sciences, Semnan, Iran.
Abstract:
In this study, tetrodotoxin (TTX) inactivation was employed to evaluate the involvement of the rat's basolateral amygdala (BLA) in hippocampus-dependent spatial memory using a place avoidance learning task. Rats were trained in single 30 min session to avoid a 60 degrees segment of the stable circular (80-cm diameter) arena, entering which was punished by a mild shock. Bilateral injections of TTX or saline were made either immediately, 1 or 2h after training. Retention was tested 24h later in a 30 min extinction session. Retention was impaired when both BLA inactivated immediately or 1h after training, but not 2h after training. These data indicate that activity in the BLA, at least 60 min after training, is necessary for the post-training processing of a hippocampus-dependent place avoidance memory.
