摘要
该文主要研究上、下视野空间选择性注意早期所诱发的ERP反应 ,探讨注意上、下视野视觉信息处理的特征与差别。10名被试的主要实验结果为 :1)对上、下视野的选择注意产生类似于注意左、右视野时P1,N1,P2的相对增强 ;2)偶极子定位显示 ,上、下视野刺激的早期注意反应(P1)以交叉方式投射到枕区 ,即下视野刺激的注意反应偏向枕区的背侧 ,而上视野刺激的注意反应偏向枕区的腹侧 ;3)上下视野的早期注意反应(P1)具有明显的不对称性 ,下视野注意反应的偶极矩远远小于上视野 ,即下视野注意反应强度明显弱于上视野。
The main purpose of this paper is to study responses of even-related potential(ERP) elicited by spatial selective attention to upper and lower visual field and to explore the characteristics and differences in brain's processing of information from upper visual field and lower visual field. The main results of the experiments from 10 subjects are as follows:(1) Spatial selective attention to upper and lower visual fields produced a relative enhancement of P1, N1, and P2, like the results of attention to left and right visual fields;(2) As revealed by dipole localization, the early attentive effects (P1) to upper and lower visual field appeared to project to occipital cortex in a way of crossing, i.e. effects to lower field are inclined to project to dorsal area of occipital cortex, and effects to upper field are inclined to project to ventral area of occipital cortex; (3) A further result indicates that the degree of early attentive effects (P1) to upper and lower visual field are asymmetric, i.e. the dipolar moments of the early attentive effects to lower field are much weaker than that to upper visual field.
出处
《生物物理学报》
CAS
CSCD
北大核心
2000年第1期73-80,共8页
Acta Biophysica Sinica
基金
国家自然科学基金委员会"九五"重大项目!(项目编号 :69790084)的资助
关键词
事件相关电位
空间选择性注意
上下视野
Spatial selective attention
Event-related potentials
Dipole localization
