Time course of scopolamine effect on memory consolidation and forgetting in rats

Giménez de Béjar, Verónica; Caballero Bleda, María; Popovic, Natalija; Popovic Popovic, Miroljub

Publication:
Time course of scopolamine effect on memory consolidation and forgetting in rats

dc.contributor.author	Giménez de Béjar, Verónica
dc.contributor.author	Caballero Bleda, María
dc.contributor.author	Popovic, Natalija
dc.contributor.author	Popovic Popovic, Miroljub
dc.contributor.department	Anatomía Humana y Psicobiología
dc.date.accessioned	2024-06-18T10:37:36Z
dc.date.available	2024-06-18T10:37:36Z
dc.date.issued	2014-11-18
dc.description	© 2014 Elsevier Inc. All rights reserved. This document is the Published version of a Published Work that appeared in final form in Neurobiology of Learning and Memory. To access the final edited and published work see http://doi.org/10.1016/j.nlm.2014.11.006
dc.description.abstract	The effect of scopolamine on the consolidation and forgetting of emotional memory has not been completely elucidated yet. The aim of the present study was to investigate the time course of scopolamine effect on consolidation and forgetting of passive avoidance response. In a first experiment of the present study, we tested the effect of scopolamine (1mg/kg, i.p., immediately after acquisition), on 24h and 48h retention performance of the step-through passive avoidance task, in adult male Wistar rats. On the 24h retested trial, the latency of the passive avoidance response was significantly lower, while on the 48h retested trial it was significantly higher in scopolamine than in the saline-treated group. In a second experiment, we assessed the 24h time course of scopolamine (1mg/kg) effect on memory consolidation in passive avoidance task. We found that scopolamine administration only within the first six and half hours after acquisition improved memory consolidation in 48h retention performance. Finally, a third experiment was performed on the saline- and scopolamine-treated rats (given immediately after acquisition) that on the 48h retention test did not step through into the dark compartment during the cut-off time. These animals were retested weekly for up to first three months, and after that, every three months until the end of experiment (i.e., 15 months after acquisition). The passive avoidance response in the saline treated group lasted up to 6 weeks after acquisition, while in the scopolamine treated group 50% of animals conserved the initial level of passive avoidance response until the experiment end point. In conclusion, the present data suggest that (1) improving or impairment effect of scopolamine given in post-training periods depends on delay of retention trial, (2) memory consolidation process could be modify by scopolamine within first six and half hours after training and (3) scopolamine could delay forgetting of emotional memory.	es
dc.format	application/pdf	es
dc.format.extent	6	es
dc.identifier.citation	Neurobiology of Learning and Memory 118 (2015) 49–54
dc.identifier.doi	https://doi.org/10.1016/j.nlm.2014.11.006
dc.identifier.issn	Print: 1074-7427
dc.identifier.issn	Electronic: 1095-9564
dc.identifier.uri	http://hdl.handle.net/10201/142387
dc.language	eng	es
dc.publisher	Elsevier	es
dc.relation	Funding for this study was provided by the Consejería de Sanidad, Región de Murcia, Spain (MCB).	es
dc.relation.publisherversion	https://www.sciencedirect.com/science/article/pii/S1074742714001968	es
dc.rights.accessRights	info:eu-repo/semantics/restrictedAccess
dc.subject	Emotional memory	es
dc.subject	Forgetting	es
dc.subject	Memory consolidation	es
dc.subject	Passive avoidance	es
dc.subject	Rat	es
dc.subject	Scopolamine	es
dc.subject.other	CDU::6 - Ciencias aplicadas	es
dc.title	Time course of scopolamine effect on memory consolidation and forgetting in rats	es
dc.type	info:eu-repo/semantics/article	es
dspace.entity.type	Publication	es
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relation.isAuthorOfPublication.latestForDiscovery	dc3015b4-805d-4b6e-a49f-f2d73bb3c2b2