Consolidação da memória e estresse pós-traumático

Quevedo, João; Agostinho, Fabiano R.; Martins, Márcio Rodrigo; Roesler, Rafaël

doi:10.1590/s1516-44462003000500007

Cited by 10 publications

(7 citation statements)

References 73 publications

(98 reference statements)

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“… 44 The processes of memory consolidation can be regulated by circulating adrenalin, noradrenalin, ACTH, among others, acting on the basolateral complex of the amydala. 45 …”

Section: Introductionmentioning

confidence: 99%

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A systematic review of the neurobiological aspects of memory in the aging process

Oliveira

Kissaki

Ordonez

et al. 2011

Dement. neuropsychol.

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A systematic review of the neuroanatomical literature was performed to determine the neuropharmacological aspects most relevant to the study of memory processes. Articles were retrieved using the search terms "biology of memory", "memory and aging", "memory impairment", "elderly and memory," and their equivalents in Portuguese. Of the studies surveyed, five studies dealt with epidemiological and demographic issues, 12 were clinical trials i.e. were based on testing and implementation of instruments in human subjects, 33 studies were basic research involving studies of mice, rats and non-human primates, and biochemical and in vitro trials and finally, 52 studies were literature reviews or book chapters which in our view, fell into this category.ConclusionsThe work sought to highlight which neural networks are most involved in processing information, as well as their location within brain regions and the way in which neurotransmitters interact with each other for the formation of these memories. Moreover, it was shown how memory changes during the normal human aging process, both positively and negatively, by analyzing the morphological alterations that occur in the brain of aging individuals.

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“… 44 The processes of memory consolidation can be regulated by circulating adrenalin, noradrenalin, ACTH, among others, acting on the basolateral complex of the amydala. 45 …”

Section: Introductionmentioning

confidence: 99%

“…Quevedo et al 45 reported that in animal studies, the amygdala was found to regulate the processes of synaptic plasticity important for the formation of memory in other regions of the brain such as the hippocampus.…”

Section: Introductionmentioning

confidence: 99%

A systematic review of the neurobiological aspects of memory in the aging process

Oliveira

Kissaki

Ordonez

et al. 2011

Dement. neuropsychol.

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“…Changes in the hippocampal function such as defi cits of synaptic contacts and on neurotransmitter systems are correlated with learning and spatial memory defi cits (Bedi, 1991;Cintra et al, 1990;Fukuda et al, 2007;Lukoyanov & Andrade, 2000;Morgane et al, 1993;Morgane et al, 2002;Zhang et al, 2010). Pharmacological, molecular and electrophysiological studies had shown evidences that the hippocampus is a structure involved in the learning and memory processes, in the formation of a spatial cognitive map (Bedi, 1992;Lukoyanov & Andrade, 2000;O'Keefe & Nadel, 1978;Olton, 1979), and also in the neuroendocrine regulation of stress hormones and consequently in the behavioral response due to stress situations (Kim & Diamond, 2002;Margis, Picon, & Cosner, 2003;McEwen, 2000;McEwen & Sapolsky, 1995;Quevedo, Feier, Agostinho, Martins, & Roesler, 2003). The responses of the organisms to stress situations involve adaptive mechanisms to react in an effective way to real or potential threats to survival (Kim & Diamond, 2002;McEwen, 2000;McEwen & Sapolsky, 1995).…”

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confidence: 99%

Effects of acute stress on learning and memory processes of malnourished rats

Vales¹,

Fukuda²,

Almeida³

2014

Psicol. Reflex. Crit.

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Abstr actThe aim of the study was to investigate the effects of acute stress on the processes of learning and memory in malnourished rats tested in the Morris water maze. The animals were divided into eight groups according to nutritional status (malnourished or well nourished) and stress (stressed or unstressed). In Experiment I the animals were subjected to immobilization stress procedure before the learning session and in Experiment II after the learning sessions. The test consisted of two daily sessions, and a memory test after four weeks. There was loss of learning and memory in malnourished rats. In Experiment I the malnourished group was positively affected by acute stress, with signifi cant improvement of performance. No effects of stress on the animals' performance in Experiment II were observed. In the memory test, the malnourished rats showed defi cits in consolidation and recall, regardless of the occurrence of stress. The stress imposed 24 hours before the learning task improved performance of malnourished animals with a protective effect of stress. However there was no improvement in the processes of retention or recall from memory (previously learned information) assessed four weeks later, during the memory retention test. Keywords: Protein malnutrition, acute stress, learning, spatial memory. ResumoO objetivo do estudo foi investigar os efeitos do estresse agudo sobre os processos de aprendizagem e memória em ratos desnutridos testados no labirinto aquático de Morris. Os animais foram divididos em oito grupos de acordo com a condição nutricional (desnutridos ou bem nutridos) e estresse (não estressados ou estressados). No Experimento I os animais foram submetidos ao procedimento de estresse por imobilização antes da sessão de aprendizagem e no Experimento II após as sessões de aprendizagem. O teste consistiu de duas sessões diárias e um teste de memória após quatro semanas. Houve prejuízos de aprendizagem e memória em ratos desnutridos. No Experimento I o grupo desnutrido foi positivamente afetado pelo estresse agudo, apresentando melhora signifi cativa de desempenho. Não foram observados efeitos do estresse sobre o desempenho dos animais no Experimento II. No teste de memória os ratos desnutridos apresentaram défi cits de consolidação e evocação, independentemente da ocorrência de estresse. O estresse imposto 24 horas antes da tarefa de aprendizagem melhorou o desempenho de animais desnutridos com um efeito protetor do estresse. Entretanto não houve melhora nos processos de retenção ou evocação da memória (informações previamente aprendidas), avaliados quatro semanas mais tarde, durante o teste de retenção de memória. Palavras-chave: Desnutrição proteica, estresse agudo, aprendizagem e memória espacial. Mailing address:

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“…Além dessas alterações cognitivas, observa-se que o estado de alerta, o estresse e a ansiedade são importantes moduladores das fases iniciais da formação da memória e sua evocação (Quevedo et al, 2003). Dessa maneira, a ansiedade pode prejudicar a capacidade de recordar ou recuperar um conteúdo aprendido em momento de tensão (Wigfeld e Eccles, 1989).…”

Section: Transtorno De Ansiedade Na Infância: Aspectos Neuropsicológicosunclassified

Aspectos neuropsicológicos dos transtornos de ansiedade na infância e adolescência: um estudo comparativo entre as fases pré e pós-tratamento medicamentoso

Rodrigues¹

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Consolidação da memória e estresse pós-traumático

Cited by 10 publications

References 73 publications

A systematic review of the neurobiological aspects of memory in the aging process

A systematic review of the neurobiological aspects of memory in the aging process

Effects of acute stress on learning and memory processes of malnourished rats

Aspectos neuropsicológicos dos transtornos de ansiedade na infância e adolescência: um estudo comparativo entre as fases pré e pós-tratamento medicamentoso

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