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首页> 外文期刊>Neurobiology of learning and memory >A more generalized fear response after a daytime nap
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A more generalized fear response after a daytime nap

机译：在白天午睡后更广泛的恐惧反应

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The aim of this study was to examine how a daytime nap affected the consolidation of fear learning. Participants first underwent fear conditioning during which they were exposed to a large and a small circle. One of these was repeatedly paired with an electric shock (making it the CS+), whereas the other circle was never paired with the shock (the CS?). After a delay interval containing either a nap or wake, participants again viewed the CS+ and the CS? intermixed with eight novel circles that varied in size between the two stimuli seen before, as well as a blue triangle that served as a novel stimulus without prior fear relevance. We examined both fear retention (the difference between the CS+ and the CS?) and fear generalization (responses to the novel stimuli based on their similarity to the original CS+). Contrary to previous studies, results from the participants who acquired a differentiated fear response during the acquisition phase revealed that the wake group showed significantly larger skin conductance responses to the CS+?compared to the CS?, whereas no such difference was present in the sleep group. These results were not driven by differences in explicit memory or by differences in general reactivity. Analyzing responses to the novel stimuli revealed a tendency towards a more generalized response in the sleep group, with no differences between the CS+?and any other stimulus, whereas the wake group showed increased responses to the stimuli depending on their similarity to the original CS+. This effect was however only present when controlling for baseline differences in worry.
机译：本研究的目的是探讨日间午睡如何影响恐惧学习的整合。参与者首先接受了恐惧调理，在此期间他们被暴露在一个大而小的圆圈中。其中一个是反复搭配的电击（使其成为CS +），而另一个圆圈从未与冲击（CS？）搭配。经过一个延迟间隔，包含一个小睡或唤醒，参与者再次查看CS +和CS？混合八个新颖的圆圈，在两种刺激之间的尺寸变化，以及一个蓝色三角形，其用作新的刺激而没有事先恐惧相关性。我们检查了恐惧保留（CS +和CS的差异，恐惧概括（基于与原始CS +的相似性为新的刺激）。与以前的研究相反，在收购阶段获得差异化恐惧反应的参与者的结果表明，Wake组对Cs +显示出显着更大的皮肤导电响应？与CSα相比，睡眠组中没有这样的差异存在。这些结果不是由显式记忆的差异或通过一般反应性的差异驱动。分析对新型刺激的反应揭示了睡眠组中更广泛的反应的趋势，CS +之间没有差异，并且任何其他刺激，而Wake组对刺激的反应增加，这取决于它们与原始CS +的相似性。然而，只有在控制基线差异时才似乎仅存在这种效果。

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