Consolidation of complex motor skill learning: evidence for a delayed offline process
Consolidation of complex motor skill learning: evidence for a delayed offline process
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DOI：
10.1093/sleep/zsy123
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发表时间：
2018-09-01
期刊：
影响因子：
5.6
通讯作者：
Censor, Nitzan
中科院分区：
文献类型：
--
作者：
Lugassy, Diva;Herszage, Jasmine;Censor, Nitzan
在最初的习得之后，跨域的研究表明，记忆通过巩固过程稳定下来，需要一个习得后的时间间隔来允许它们的发生。在程序性技能记忆中，巩固不仅可以稳定记忆，同时还可以通过积累额外的表现收益来增强记忆。此外，外显技能任务之前被证明是通过睡眠巩固的，而内隐任务是在不包括睡眠时期的时间间隔后巩固的。虽然之前的研究已经有助于利用简单的运动任务来模拟技能学习，但技能巩固过程是否以及如何在复杂的现实生活环境中运行仍有待确定。在这里，我们测试了一种复杂的运动技能的巩固，用于训练精细运动的执行。由于复杂的任务是明确的，我们假设睡眠后立即会有明显的巩固，就像简单的明确的运动技能一样。然而，结果表明，即使参与者知道复杂技能任务的目标，但只有在技能获得后24小时，巩固才明显，而不是在较短的12小时间隔之后，即使后者包括睡眠。另一项实验证实，如果没有超过12小时的时间间隔，相同的技能训练不会得到完全巩固。这些结果表明，任务复杂性是决定允许完全巩固的适当术语的关键特征。由于本研究的生态有效性增强，揭示复杂运动技能和简单运动技能之间的差异可以为神经损伤后的高级康复方法提供便利。
Following initial acquisition, studies across domains have shown that memories stabilize through consolidation processes, requiring a post-acquisition temporal interval to allow their occurrence. In procedural skill memories, consolidation not only stabilizes the memory, but also simultaneously enhances it by accumulating additional gains in performance. In addition, explicit skill tasks were previously shown to consolidate through sleep, whereas implicit tasks were consolidated following a time interval which did not include a period of sleep. Although previous research has been instrumental in utilizing simple motor tasks designed to model skill learning, whether and how skill consolidation processes operate in complex real-life environments remains to be determined. Here, we tested consolidation in a complex motor skill, used to train execution of fine-motor movements. Since the complex task was explicit, we hypothesized that consolidation will be evident immediately following sleep, as in simple explicit motor skills. However, results show that even though participants were aware of the goal of the complex skill task, consolidation was evident only 24 hr following skill acquisition, and not following a shorter 12 hr interval, even when the latter included sleep. An additional experiment verified that without a temporal interval longer than 12hr, the same skill training does not undergo complete consolidation. These results suggest that task complexity is a crucial characteristic determining the proper terms allowing full consolidation. Due to the enhanced ecological validity of this study, revealing the differences between complex and simple motor skills could enable the facilitation of advanced rehabilitation methods following neurological injuries.