Posttraining sleep enhances automaticity in perceptual discrimination
Posttraining sleep enhances automaticity in perceptual discrimination
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DOI：
10.1162/089892904322755557
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发表时间：
2004-01-01
影响因子：
3.2
通讯作者：
Stickgold, R
中科院分区：
文献类型：
--
作者：
Atienza, M;Cantero, JL;Stickgold, R
感知学习可以在很长一段时间内发展，训练后几天会出现缓慢的，有时依赖于睡眠的改善。因此，表现可以变得更加自动化，也就是说，较少依赖于自愿注意。这项研究调查了这种自动性增强的大脑相关性是否依赖于睡眠。当受试者的注意力集中在其他地方时，记录受试者对复杂听觉刺激产生的事件相关电位。我们在这里报告，培训后的听觉辨别任务，性能继续提高，没有显着的进一步培训，为72小时。同时，几个事件相关的潜在组件变得明显4872小时后培训。训练后睡眠剥夺既不能阻止持续的性能改善，也不能阻止与任务熟悉度提高相关的皮质动力学的缓慢发展。然而，那些与注意力自动转移到意想不到的刺激相关的大脑反应未能发展。因此，在这种听觉学习范式中，训练后睡眠似乎通过促进潜在有意义的刺激侵入到一个人的注意力焦点中进行进一步评估来减少成功感知辨别所需的自愿注意力努力。
Perceptual learning can develop over extended periods, with slow, at times sleep-dependent, improvement seen several days after training. As a result, performance can become more automatic, that is, less dependent on voluntary attention. This study investigates whether the brain correlates of this enhancement of automaticity are sleep-dependent. Event-related potentials produced in response to complex auditory stimuli were recorded while subjects' attention was focused elsewhere. We report here that following training on an auditory discrimination task, performance continued to improve, without significant further training, for 72 hr. At the same time, several event-related potential components became evident 4872 hr after training. Posttraining sleep deprivation prevented neither the continued performance improvement nor the slow development of cortical dynamics related to an enhanced familiarity with the task. However, those brain responses associated with the automatic shift of attention to unexpected stimuli failed to develop. Thus, in this auditory learning paradigm, posttraining sleep appears to reduce the voluntary attentional effort required for successful perceptual discrimination by facilitating the intrusion of a potentially meaningful stimulus into one's focus of attention for further evaluation.