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2007 | 58 | 1 |
Tytuł artykułu

Effects of two types of restraint stress on spontaneous behavior of Sprague-Dawley and Lewis rats

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Abstrakty
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The purpose of this study was to evaluate the action of two types of stressors in Sprague-Dawley (S-D) and Lewis (LEW) rats differing in their hypothalamic-pituitary-adrenal axis activity on locomotion and rearing in an open space. Exposure to restraint immobilization alone (IMO) or this immobilization combined with cold water (22 °C) immersion (IMO+C) lasted for 1 h and started 2 or 5 h before the test. To evaluate the acute and persisting effects of both stressors, four trials were performed in one-week intervals; rats were exposed to the stressors in trial 1 and 3. While in LEW rats both acute stressors produced reduction of locomotion and rearing in all stressed groups, S-D rats responded with a decrease of both parameters only after IMO+C presented 2 h before testing. Neither strain displayed a changed performance one week after the first stress exposure. One week after the second stress exposure rats of both strains exhibited a tendency to an increase of both parameters reaching the significance in several experimental groups. The findings indicate: a) the IMO+C produced stronger behavioral alteration than IMO alone; b) the behavioral responses to stressors were more pronounced in LEW compared to S-D strain; c) change from the reduction of activity to its increase may be interpreted as bi-directional manifestation of long-term effects of immobilization stress.
Wydawca
-
Rocznik
Tom
58
Numer
1
Opis fizyczny
p.83-94,fig.,ref.
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  • Charles University in Prague, Albertov 4, 128 00 Prague 2, Czech Republic
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autor
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Bibliografia
Typ dokumentu
Bibliografia
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bwmeta1.element.agro-article-cf8d6309-c4cf-41ba-832e-71718b27f07b
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