文章基本信息

标题：Effects of Acute Stress on Learning and Memory Processes of Malnourished Rats
本地全文：下载
作者：Lucas Duarte Ferreira Manhas dos Vales ; Marisa Tomoe Hebihara Fukuda ; Sebastião Sousa Almeida 等
期刊名称：Psicologia: Reflexão e Crítica
印刷版ISSN：0102-7972
电子版ISSN：1678-7153
出版年度：2014
卷号：27
期号：4
页码：784-793
语种：English
出版社：Universidade Federal do Rio Grande do Sul
摘要：The 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 signi fi 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 de fi 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.
其他摘要：The 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 signi fi 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 de fi 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.
关键词：Protein malnutrition; acute stress; learning; spatial memory.
其他关键词：Protein malnutrition; acute stress; learning; spatial memory.