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TitleImpact of chronic stress protocols in learning and memory in rodents: systematic review and meta-analysis
Author(s)Moreira, Pedro Miguel Silva
Almeida, Pedro R.
Almeida, Hugo Leite
Sousa, Nuno
Costa, Patrício Soares
Issue date2016
PublisherPublic Library of Science (PLOS)
JournalPLoS ONE
CitationMoreira, P. S., Almeida, P. R., Leite-Almeida, H., Sousa, N., & Costa, P. (2016). Impact of Chronic Stress Protocols in Learning and Memory in Rodents: Systematic Review and Meta-Analysis. Plos One, 11(9). doi: 10.1371/journal.pone.0163245
Abstract(s)The idea that maladaptive stress impairs cognitive function has been a cornerstone of decades in basic and clinical research. However, disparate findings have reinforced the need to aggregate results from multiple sources in order to confirm the validity of such statement. In this work, a systematic review and meta-analyses were performed to aggregate results from rodent studies investigating the impact of chronic stress on learning and memory. Results obtained from the included studies revealed a significant effect of stress on global cognitive performance. In addition, stressed rodents presented worse consolidation of learned memories, although no significantly differences between groups at the acquisition phase were found. Despite the methodological heterogeneity across studies, these effects were independent of the type of stress, animals' strains or age. However, our findings suggest that stress yields a more detrimental effect on spatial navigation tests' performance. Surprisingly, the vast majority of the selected studies in this field did not report appropriate statistics and were excluded from the quantitative analysis. We have therefore purposed a set of guidelines termed PROBE (Preferred Reporting Orientations for Behavioral Experiments) to promote an adequate reporting of behavioral experiments.
Publisher version
AccessOpen access
Appears in Collections:ICVS - Artigos em revistas internacionais / Papers in international journals

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