When more equals less: overtraining inhibits perceptual learning owing to lack of wakeful consolidation
When more equals less: overtraining inhibits perceptual learning owing to lack of wakeful consolidation
复制标题
DOI：
10.1098/rspb.2012.1423
复制
发表时间：
2012-10-22
影响因子：
4.7
通讯作者：
Pearson, Joel
中科院分区：
文献类型：
--
作者：
Ashley, Soren;Pearson, Joel
在知觉任务上的表现通常会随着训练而提高。然而，过多的连续训练可能是有害的。重复的日内测试或过度训练证明了这对知觉学习的有害影响。在睡眠中巩固所学信息有能力防止这种学习缺陷。然而，关于清醒巩固在防止过度训练的影响方面的作用，人们知之甚少。在这里，我们报告了知觉退化可能是由于早期清醒的巩固过程的中断造成的。三组在第一天和24小时后进行了动作辨别任务的测试。第一天在两次训练之间休息1小时的参与者在第二天表现出更好的准确性(即学习)。只在第一天完成第一次培训的受试者也表现出了学习能力。然而，连续完成两个模块的受试者(“过度训练”)在第二天并没有表现出准确率的提高。有趣的是，反应时的变化并不受过度训练的影响，而是随着试验次数的增加而加快。这些数据表明，过度训练的影响可能是由于清醒的巩固过程被扰乱。
Performance on perceptual tasks usually improves with training. However, too much consecutive training can be detrimental. Repeated within-day testing or overtraining demonstrates the detrimental effects this has on perceptual learning. Consolidation of learnt information during sleep has the power to prevent such deficits in learning. However, little is known regarding the role of wakeful consolidation in preventing the effects of overtraining. Here, we report that perceptual deterioration may result from the disruption of early wakeful consolidation processes. Three groups were tested on day 1 and again 24 h later, on a motion discrimination task. Participants who had a 1 h break between the two training sessions on the first day displayed improved accuracy on the second day (i.e. learning). Subjects who only completed the first training session on day 1 also exhibited learning. However, individuals who completed two blocks without a break ('overtraining') showed no improvement in accuracy on day 2. Interestingly, changes in reaction times were not susceptible to the effects of overtraining, but instead speeded up as a function of total performed trials. These data suggest that effects of overtraining might be due to disruption of wakeful consolidation processes.