| Autor: |
DAWOOD, M Y., LUMLEY, L A., ROBISON, C L., SAVIOLAKIS, G A., MEYERHOFF, J L. |
| Předmět: |
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| Zdroj: |
Annals of the New York Academy of Sciences; 2004, Vol. 1032 Issue 1, p304-307, 4p |
| Abstrakt: |
Repeated restraint stress in rodents impairs spatial memory in a Y-maze test and induces hippocampal neuronal changes that last up to 5 d after the stressor ends. Our goal was to implement a Barnes maze spatial memory test in mice that could be used to validate our findings of social stress induced Y-maze impairment. We measured performance of mice in 5- and 9-day test paradigms previously used in rats and mice, respectively. Selecting features from each paradigm, we implemented a 5-d test (pre-training, training (4 trials/ d/3 d) and probe testing for assessment of spatial memory in mice. Stress consisted of placing each test mouse in a stainless steel perforated box (25.5 cm x 21.5 cm x 16.5 cm) within an aggressor's home cage for 6 h/d for 21 d; direct agonistic encounters occurred randomly throughout stress periods. Barnes maze pre-training (habituation) was on day 21 of the stress exposures. In a preliminary experiment, mice that habituated following their last stressor performed poorly relative to unstressed and to those not habituated prior to the last stressor, as demonstrated by a greater latency to escape and more errors. We conclude that acute stress in a chronic stress paradigm may impair spatial memory acquisition. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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