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Inactivation of the basolateral amygdala impairs the retrieval of recent and remote taste-potentiated odor aversion memory
Centre Européen des Sciences du Goût, CNRS UMR 5170, 15 rue Hugues Picardet, 21000 DIJON, France.
Centre Européen des Sciences du Goût, CNRS UMR 5170, 15 rue Hugues Picardet, 21000 DIJON, France.
2009 (English)In: Neurobiology of Learning and Memory, ISSN 1074-7427, E-ISSN 1095-9564, Vol. 92, no 4, p. 590-596Article in journal (Refereed) Published
Abstract [en]

Memory reorganization as a time-dependent process can be investigated using various learning tasks such as the taste-potentiated odor aversion (TPOA). In this paradigm rats acquire a strong aversion to an olfactory cue presented simultaneously with a gustatory cue. Together these cues are paired with a delayed visceral illness. The basolateral amygdaloid nucleus (BLA) plays a key role in TPOA acquisition but its involvement in retrieval remains unclear. We investigated the involvement of the BLA in either recent or remote retrieval of TPOA. In each case, the number of licks observed in response to the presentation of either the odor or the taste was used to assess retrieval. Before the retrieval test, rats received a bilateral infusion of lidocaine to inactivate the BLA. We observed that both recent and remote TPOA retrieval tests induced by the odor presentation were disrupted in the lidocaine-injected rats. By contrast, the BLA inactivation had no effect upon the aversion towards the taste cue regardless of the time of retrieval. The present study provides evidence that BLA functioning is necessary for retrieval of aversive odor memory, even with a long post-acquisition delay.

Place, publisher, year, edition, pages
Academic Press, 2009. Vol. 92, no 4, p. 590-596
Keywords [en]
Basolateral amygdala, Lidocaine, Retrieval, Odor aversion, Taste aversion
National Category
Neurosciences
Identifiers
URN: urn:nbn:se:liu:diva-150385DOI: 10.1016/j.nlm.2009.07.008ISI: 000277532800014PubMedID: 19643197Scopus ID: 2-s2.0-69949094933OAI: oai:DiVA.org:liu-150385DiVA, id: diva2:1240548
Available from: 2018-08-21 Created: 2018-08-21 Last updated: 2018-08-29Bibliographically approved

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Shionoya, Kiseko

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