注意瞬脱的神经机制及其理论解释

The Neural Basis of Attentional Blink

对一个目标的准确报告使得很难报告之后500ms内呈现的另一个目标,这种加工削弱被定义为注意瞬脱。注意瞬脱范式可以用来研究注意的时间进程。对于注意瞬脱现象已经有了多种理论解释,许多研究者利用功能核磁共振和事件相关电位等神经成像技术考察了注意瞬脱的神经机制。相关研究结果支持自上而下的控制过程与自下而上过程的交互作用导致了瞬脱现象的产生。最后对这些研究存在的问题和尚未解决的问题做了简要的说明。

It is believed that the human cognitive system is fundamentally limited in deploying attention over time. Directing attention to a target prevents accurate report of a second target presented within approximately 500 ms of the first. This impairment has been termed the attentional blink （AB）. The AB paradigm has been primarily in the focus of investigations of the time course of attention. In this paper, we provide an overview of recent cognitive neuroscience studies devoted to analyze the neural process underlying the AB and their temporal dynamics. The research results support the idea that the interaction between top-down and bottom -up maybe contribute to the AB.