文章基本信息

标题：Coherent amygdalocortical theta promotes fear memory consolidation during paradoxical sleep
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作者：Daniela Popa ; Sevil Duvarci ; Andrei T. Popescu 等
期刊名称：Proceedings of the National Academy of Sciences
印刷版ISSN：0027-8424
电子版ISSN：1091-6490
出版年度：2010
卷号：107
期号：14
页码：6516-6519
DOI：10.1073/pnas.0913016107
语种：English
出版社：The National Academy of Sciences of the United States of America
摘要：Brain activity in sleep plays a crucial role in memory consolidation, an offline process that determines the long-term strength of memory traces. Consolidation efficacy differs across individuals, but the brain activity dynamics underlying these differences remain unknown. Here, we studied how interindividual variability in fear memory consolidation relates to neural activity in brain structures that participate in Pavlovian fear learning. From the end of training to testing 24 h later, some rats showed increased and others decreased conditioned fear responses. We found that overnight bidirectional changes in fear memory were selectively correlated with modifications in theta coherence between the amygdala, medial prefrontal cortex, and hippocampus during paradoxical sleep. Thus, our results suggest that theta coordination in the limbic system may influence interindividual differences in memory consolidation of aversive experiences.
关键词：amygdala ; fear conditioning ; prefrontal cortex ; hippocampus ; Granger causality