作　　者： ; ; ; ; ; (尧德中）;

机构地区： 四川大学电气信息学院

出　　处： 《生物物理学报》 2005年第5期391-395,共5页

摘　　要： 利用128道高分辨率脑电测量技术及脑电相干处理技术,通过测量大脑对图形形状知觉(任务1)、图形形状和空间位置知觉(任务2)两种任务的事件相关电位,并基于电极数大致相同的原则,从枕叶至额叶把头表分成7个区,然后分析了枕叶与其它各区在不同频段的相干性。结果发现:在"1频段(28～39Hz),任务2时的平均相干系数值显著大于任务1时的相应值;同时还发现在枕叶与额叶间,任务2的相干系数更显著地大于任务1的相干系数。结合视觉的两条通路的理论,这一结果从相干性角度表明,背侧通道的参与强化了枕叶与额叶之间的信息沟通,而这种沟通主要在γ1频段。 Two kinds of method, 128-channel high resolution electroencephalograms and coherence technology, were adopted to research the cognitive activation patterns in responding to the task of form perception （taskl） and the task involving both form discrimination and spatial location （task2）. Simultaneously, the scalp was divided into 7 parts from occipital area to frontal area, each of them included the same number electrodes. Coherences, between occipital area and other areas, of different frequency band were calculated. The results indicated that the average coherence index of task2 was significantly bigger than that of task1 in γ1 band （28-39 Hz）. In addition, between occipital area and frontal area, the difference of coherence index between task2 and task1 was significantly bigger than that between occipital area and others. Combined with two visual pathways theory, and from coherence aspect, these data suggested that the information communication between occipital area and frontal area has been strengthened by the participation of dorsal stream, which happened mainly in γ1 band.

关 键 词： 腹侧通路 背侧通路 频段 事件相关电位 相干系数

领　　域： [生物学] [生物学]