Título: | Effect of repeated restraint stress on memory in different tasks |
Autores: |
Gamaro, Giovana Duzzo Michalowski, Mariana Bohns Catelli, Dayenne Helena Xavier, Marcia Henriques Dalmaz, Carla |
Fecha: |
2010-04-24 1999 |
Publicador: | |
Fuente: |
Ver documento |
Tipo: |
Artigo de periódico Nacional |
Tema: |
Chronic stress Bioquímica Memory Inhibitory avoidance Two-way active avoidance Open field |
Descripción: | The present study investigated the effect of repeated stress applied to female rats on memory evaluated by three behavioral tasks: two-way shuttle avoidance, inhibitory avoidance and habituation to an open field. Repeated stress had different effects on rat behavior when different tasks were considered. In the two-way active avoidance test the stressed animals presented memory of the task, but their memory scores were impaired when compared to all other groups. In the habituation to the open field, only the control group showed a significant difference in the number of rearings between training and testing sessions, which is interpreted as an adequate memory of the task. In the handled and chronically stressed animals, on the other hand, no memory was observed, suggesting that even a very mild repeated stress would be enough to alter habituation to this task. The performance in the inhibitory avoidance task presented no significant differences between groups. The findings suggest that repeated restraint stress might induce cognitive impairments that are dependent on the task and on stress intensity. |
Idioma: | Inglés |
1 | 6 |
2 A vida em separado : estudo de um condomínio fechado de Porto Alegre por Quadros, Caroline Souza de | 7 |
3 | 8 O clítico acusativo na redação escolar por Dutra, Líria Romero |
4 "O passado está prenhe do futuro" : a escrita da história no Instituto Histórico e Geográfico do Rio Grande do Sul (1920-30) por Silveira, Daniela Oliveira | 9 Superfície de imagens : o tema do olhar em Borges e em Cortázar por Botelho, José Francisco Hillal Tavares de Junqueira |
5 | 10 |