Intercommunication Between Prefrontal and Posterior Brain Regions for Protecting Visual Working Memory From Distractor Interference
Intercommunication Between Prefrontal and Posterior Brain Regions for Protecting Visual Working Memory From Distractor Interference
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DOI：
10.1177/0956797613501170
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发表时间：
2014-02-01
影响因子：
8.2
通讯作者：
Zimmer, Hubert D.
中科院分区：
文献类型：
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作者：
Liesefeld, Anna M.;Liesefeld, Heinrich R.;Zimmer, Hubert D.
由于视觉工作记忆的容量非常有限，因此良好的过滤机制对于其成功发挥作用至关重要。前额皮质发出的神经元信号被认为是过滤的重要贡献者。然而，该信号在正常认知功能期间的功能意义的证据仍然缺失。此外，迄今为止的研究忽略了前额皮质必须接收来自后脑区域的输入，这些区域报告过滤的必要性。从人类脑电图中，我们提取了几个反映不同过滤子过程的事件相关组件。根据它们的时间安排和清晰的相关性模式，我们推断过滤可能由涉及前额叶和后部皮层区域的事件因果链组成：在后部区域检测到干扰物后，前额叶机制被激活，这反过来又防止了随后不必要的干扰物信息的顶叶存储。
Because visual working memory has a very restricted capacity, good filtering mechanisms are essential for its successful functioning. A neuronal signal emitted by the prefrontal cortex is considered to be an important contributor to filtering. Proof of the functional significance of this signal during normal cognitive functioning is, however, still missing. Furthermore, research has so far neglected that the prefrontal cortex must receive input from posterior brain areas that report the necessity to filter. From human electroencephalograms, we extracted several event-related components that reflect the different subprocesses of filtering. On the basis of their timing and a clear pattern of correlations, we reason that filtering might consist of a causal chain of events that involve prefrontal and posterior cortex regions: After distractors are detected in posterior regions, a prefrontal mechanism is activated, which in turn prevents subsequent unnecessary parietal storage of distractor information.