Sleep-dependent learning and motor-skill complexity
Sleep-dependent learning and motor-skill complexity
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DOI：
10.1101/lm.76304
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发表时间：
2004-11-01
影响因子：
2
通讯作者：
Walker, MP
中科院分区：
文献类型：
--
作者：
Kuriyama, K;Stickgold, R;Walker, MP
众所周知，程序性运动技能任务的学习要经历一系列独特的记忆阶段。表现最初在训练期间有所提高，并且在随后的睡眠期间无需进一步排练即可继续提高。在这里，我们研究了当任务特征在几个难度级别上变化时，这种延迟的睡眠依赖性学习是如何受到影响的，以及这种改进是否有差异地增强了正在学习的运动序列模式的个体转换。我们报告说，无论是学习五元素单手序列（提高 17.7%）、九元素单手序列（提高 20.2%）还是五元素双手序列（17.5%），受试者在一夜之间的速度都有类似的提高，但在学习九元素双手序列时，在一夜之间表现出显着提高（28.9%）。此外，在训练结束时出现最困难的运动序列模式中的个体转换显示速度在一夜之间显着提高了 17.8%，而那些在训练结束时执行最快的转换仅显示出不显着的 1.4% 的提高。总之，这些发现表明，依赖睡眠的学习过程有选择性地为运动技能程序提供了最大的益处，而运动技能程序被证明在睡眠前是最困难的。
Learning of a procedural motor-skill task is known to progress through a series Of unique memory stages. Performance initially improves during training, and continues to improve, without further rehearsal, across subsequent periods of sleep. Here, we investigate how this delayed sleep-dependent learning is affected when the task characteristics are varied across several degrees of difficulty, and whether this improvement differentially enhances individual transitions of the motor-sequence pattern being learned. We report that subjects show similar overnight improvements in speed whether learning a five-element unimanual sequence (17.7% improvement), a nine-element unimanual Sequence (20.2%), or a five-element bimanual sequence (17.5%), but show markedly increased overnight improvement (28.9%) with a nine-element bimanual sequence. In addition, individual transitions within the motor-sequence pattern that appeared most difficult at the end of training showed a significant 17.8% increase in speed overnight, whereas those transitions that were performed most rapidly at the end of training showed only a non-significant 1.4% improvement. Together, these findings Suggest that the sleep-dependent learning process selectively provides maximum benefit to motor-skill procedures that proved to be most difficult prior to sleep.