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目的:探讨触觉-视觉交叉模式工作记忆的大脑神经活动机理。方法:训练11个正常受试者学习交叉模式工作记忆任务,利用Neuroscan EEG系统记录脑电活动,对脑电数据求源分析后,着重考察事件相关脑电成分所处的大脑空间位置。结果发现:在延时过程中的3个主要的脑电成分N40,LPC和LNC的神经活动源分别处于大脑的右侧顶叶,中间后顶叶和前额叶。这提示了交叉模式工作记忆中相继的三个神经认知功能:感知,触觉-视觉模式间的信息交互,和工作记忆的维持。
Objective: To explore the mechanism of brain activity in tactile-visual cross-working memory. Methods: Eleven normal subjects were trained to work in crossover mode of working memory task. Neuroscan EEG system was used to record EEG activity. After source analysis of EEG data, the spatial location of brain related to the event-related EEG was investigated. The results showed that the neurotransmitters of N40, LPC and LNC, the three major electroencephalogram components in the time-delay process, were located in the right parietal lobe, middle parietal lobe and prefrontal lobe. This suggests the succession of three neurocognitive functions in crossed working memory: perception, tactile-visual interaction of information, and maintenance of working memory.