An ultra short episode of sleep is sufficient to promote declarative memory performance
An ultra short episode of sleep is sufficient to promote declarative memory performance
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DOI：
10.1111/j.1365-2869.2008.00622.x
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发表时间：
2008-03-01
影响因子：
4.4
通讯作者：
Pietrowsky, Reinhard
中科院分区：
文献类型：
--
作者：
Lahl, Olaf;Wispel, Christiane;Pietrowsky, Reinhard
各种研究表明，一夜的睡眠对保留先前获得的陈述性材料有有益的影响。在两个实验中，我们解决了这种影响是否延伸到白天小睡的问题。在第一个实验中，我们评估了一个30个单词的列表后，60分钟的保留间隔，无论是充满白天小睡或清醒活动的自由回忆。与清醒时相比，午睡后记忆力显著增强，但与慢波睡眠时间或午睡条件下的总睡眠时间无关。第二个实验旨在阐明总睡眠时间的作用，因此包括额外的第三组，允许小睡平均不超过6分钟。在比较无小睡（清醒）、短暂小睡和长时间小睡条件下的单词回忆时，我们发现，与清醒相比，小睡条件下的单词回忆上级，以及与短暂小睡相比，长时间小睡条件下的单词回忆。这些结果表明，即使是极短的睡眠时间也足以增强记忆处理。我们认为，仅仅是睡眠的开始就可能启动积极的巩固过程，一旦触发，即使睡眠在此后不久终止，巩固过程仍然有效。
Various studies have demonstrated that a night of sleep has a beneficial effect on the retention of previously acquired declarative material. In two experiments, we addressed the question of whether this effect extends to daytime naps. In the first experiment we assessed free recall of a list of 30 words after a 60 min retention interval that was either filled with daytime napping or waking activity. Memory performance was significantly enhanced after napping as opposed to waking but was not correlated with time spent in slow wave sleep or total sleep time within the napping condition. The second experiment was designed to clarify the role of total sleep time and therefore included an additional third group, which was allowed to nap for no longer than 6 min on average. In comparing word recall after conditions of no napping (waking), short napping, and long napping, we found superior recall for both nap conditions in contrast to waking as well as for long naps in contrast to short naps. These results demonstrate that even an ultra short period of sleep is sufficient to enhance memory processing. We suggest that the mere onset of sleep may initiate active processes of consolidation which - once triggered - remain effective even if sleep is terminated shortly thereafter.