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Recurrent stress across life may improve cognitive performance in individual rats, suggesting the induction of resilience

机译:跨越寿命的反复压力可能会改善个别大鼠的认知性能,表明弹性的诱导

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Depressive symptoms are often accompanied by cognitive impairments and recurrent depressive episodes are discussed as a potential risk for dementia. Especially, stressful life events are considered a potent risk factor for depression. Here, we induced recurrent stress-induced depressive episodes over the life span of rats, followed by cognitive assessment in the symptom-free period. Rats exposed to stress-induced depressive episodes learned faster than control rats. A high degree of stress-induced depressive-like behavior early in the paradigm was a predictor of improved cognitive performance, suggesting induction of resilience. Subsequently, exposure to lorazepam prior to stress-induced depressive episodes and cognitive testing in a nonaversive environment prevented the positive effect. This indicates a beneficial effect of the stress-associated situation, with the existence of individual coping abilities. Altogether, stress may in some have a beneficial effect, yet for those individuals unable to tackle these aversive events, consecutive unpleasant episodes may lead to worse cognitive performance later in life.
机译:抑郁症状通常伴有认知障碍,并讨论复发性抑郁发作作为痴呆症的潜在风险。特别是,压力的生活事件被认为是抑郁症的有效危险因素。在这里,我们在大鼠的寿命中诱导复发应激诱导的抑郁发作,随后在无症状期间进行认知评估。暴露于应激诱导的抑郁发作的大鼠比对照大鼠更快地学习。在范式中,在范式中,高度应激引起的抑郁样行为是改善认知性能的预测因素,表明弹性诱导。随后,在胁迫诱导的抑郁发作之前暴露于洛拉西泮,在不活动环境中的认知测试预防积极效应。这表明存在个体应对能力的应力相关情况有益效果。完全,压力可能在某些人有一个有益的效果,然而对于那些无法解决这些厌恶事件的人而言,连续的令人不快的剧集可能导致生活中稍后的认知性能。

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