Strengthened effective connectivity underlies transfer of working memory training to tests of short-term memory and attention.
Strengthened effective connectivity underlies transfer of working memory training to tests of short-term memory and attention.
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DOI：
10.1523/jneurosci.5565-12.2013
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发表时间：
2013-05-15
期刊：
影响因子：
--
通讯作者：
Postle BR
中科院分区：
文献类型：
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作者：
Kundu B;Sutterer DW;Emrich SM;Postle BR
虽然长期以来一直被认为是一种天生的和固定的特质，但最近的研究表明，工作记忆（WM）能力可以通过强化训练来提高。然而，这些训练效果的神经基础，以及工作记忆训练的收益转移到其他认知任务的程度，仍然存在争议和知之甚少。在这里，我们提出了来自人类电生理学（EEG）和同步经颅磁刺激（TMS）和EEG的证据，即WM训练向其他认知任务的转移得到了与任务相关的额顶叶和顶枕叶网络中有效连接变化的支持，这些网络由训练和转移任务参与。这种效应的一个后果是刺激处理的效率更高，证明了在短期记忆能力和视觉搜索性能的个体差异的EEG指数的变化。转移到搜索相关的活动提供了证据，比特定任务的策略或刺激特定的表征更基本的东西已经学会。此外，这些模式的培训和转移突出的作用，共同的神经系统在确定个体差异方面的视觉空间认知。
Although long considered a natively endowed and fixed trait, working memory (WM) ability has recently been shown to improve with intensive training. What remains controversial and poorly understood, however, are the neural bases of these training effects, and the extent to which WM training gains transfer to other cognitive tasks. Here we present evidence from human electrophysiology (EEG) and simultaneous transcranial magnetic stimulation (TMS) and EEG that the transfer of WM training to other cognitive tasks is supported by changes in task-related effective connectivity in frontoparietal and parietooccipital networks that are engaged by both the trained and transfer tasks. One consequence of this effect is greater efficiency of stimulus processing, as evidenced by changes in EEG indices of individual differences in short-term memory capacity and in visual search performance. Transfer to search-related activity provides evidence that something more fundamental than task-specific strategy or stimulus-specific representations have been learned. Furthermore, these patterns of training and transfer highlight the role of common neural systems in determining individual differences in aspects of visuospatial cognition.