Inactivation of the dorsal hippocampus or the medial prefrontal cortex impairs retrieval but has differential effect on spatial memory reconsolidation

Please use this identifier to cite or link to this item: https://repositorio.ufrn.br/handle/123456789/23130

Title:	Inactivation of the dorsal hippocampus or the medial prefrontal cortex impairs retrieval but has differential effect on spatial memory reconsolidation
Authors:	Rossato, Janine I. Köhler, Cristiano A. Radiske, Andressa Bevilaqua, Lia Rejane Müller Cammarota, Martín Pablo
Keywords:	Anisomycin;Memory;Muscimol;Reactivation;Recall;Water maze
Issue Date:	2015
Portuguese Abstract:	Active memories can incorporate new information through reconsolidation. However, the notion that memory retrieval is necessary for reconsolidation has been recently challenged. Non-reinforced retrieval induces hippocampus and medial prefrontal cortex (mPFC)-dependent reconsolidation of spatial memory in the Morris water maze (MWM). We found that the effect of protein synthesis inhibition on this process is abolished when retrieval of the learned spatial preference is hindered through mPFC inactivation but not when it is blocked by deactivation of dorsal CA1. Our results do not fully agree with the hypothesis that retrieval is unneeded for reconsolidation. Instead, they support the idea that a hierarchic interaction between the hippocampus and the mPFC controls spatial memory in the MWM, and indicate that this cortex is sufficient to retrieve the information essential to reconsolidate the spatial memory trace, even when the hippocampus is inactivated.
URI:	https://repositorio.ufrn.br/jspui/handle/123456789/23130
Appears in Collections:	ICe - Artigos publicados em periódicos

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