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  Dissociated theta phase synchronization in amygdalo- hippocampal circuits during various stages of fear memory

Narayanan, R., Seidenbecher, J., Kluge, C., Bergado, J., Stork, O., & Pape, H. (2007). Dissociated theta phase synchronization in amygdalo- hippocampal circuits during various stages of fear memory. European Journal of Neuroscience: European Neuroscience Association, 25(6), 1823-1831. doi:10.1111/j.1460-9568.2007.05437.x.

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Narayanan, RT1, Author              
Seidenbecher , J, Author
Kluge , C, Author
Bergado, J, Author
Stork, O, Author
Pape, HC, Author
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1External Organizations, ou_persistent22              

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 Abstract: The amygdala and the hippocampus are critically involved in the formation and retention of fear memories. However, their precise contribution to, and their interplay during, fear memory formation are not fully understood. In the present study we investigated network activities in the amygdalo-hippocampal system of freely behaving mice at different stages of fear memory consolidation and retention. Our data show enhanced theta phase synchronization in this pathway during the retrieval of fear memory at long-term (24 h post-training), but not short-term (2 min, 30 min and 2 h post-training) stages, following both contextual and auditory cued conditioning. However, retrieval of remotely conditioned fear (30 days post-training) failed to induce an increase in synchronization despite there still being memory retention. Thus, our data indicate that the amygdalo-hippocampal interaction reflects a dynamic interaction of ensemble activities related to various stages of fear memory consolidation and/or retention, and support the notion that recent and remote memories are organized through different network principles.

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 Dates: 2007-03
 Publication Status: Published in print
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 Identifiers: DOI: 10.1111/j.1460-9568.2007.05437.x
BibTex Citekey: NarayananSKBSP2007
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Title: European Journal of Neuroscience : European Neuroscience Association
  Other : Eur. J. Neurosci
Source Genre: Journal
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Publ. Info: Oxford, UK : Published on behalf of the European Neuroscience Association by Oxford University Press
Pages: - Volume / Issue: 25 (6) Sequence Number: - Start / End Page: 1823 - 1831 Identifier: ISSN: 0953-816X
CoNE: https://pure.mpg.de/cone/journals/resource/954925575988