Brain dynamic mechanisms on the visual attention scale with Chinese characters cues  

作　　者：GAO Wenbin WEI Jinghan PENG Xiaohu WEI Xing LUO Yuejia 

机构地区：[1]Laboratory of Mental Health,Institute of Psychology,Chinese Academy of Sciences,Beijing 100101,China [2]Lab Visual Information Processing,Chinese Academy of Sciences,Beijing 100101,China

出　　处：《Chinese Science Bulletin》2002年第19期1644-1649,共6页

基　　金：This work was supported by theNational Natural Science Foundation of China (Grant No. 39970257);the Multidisciplinary Research Program of the Chinese Academy of Sciences (Grant No. KJCXl-07);by the Hundred Talents Program of the the Chinese Academy o

摘　　要：The temporal dynamics in brain evoked by the scale of visual attention with the cues of Chinese characters were studied by recording event-related potentials (ERPs). With the fixed orientation of visual attention, 14 healthy young participants performed a search task in which the search array was preceded by Chinese characters cues, '大, 中, 小' (large, medium, small). 128 channels scalp ERPs were recorded to study the role of visual attention scale played in the visual spatial attention. The results showed that there was no significant difference in the ERP components evoked by the three Chinese characters cues except the in-feroposterior N2 latency. The targets evoked P2, N2 amplitudes and latency have significant differences with the different cues of large, middle and small, while P1 and N1 components had no significant difference. The results suggested that the processing of scale of visual attention was mainly concerned with P2, N2 components, while the P1, N1 components were mainly related withThe temporal dynamics in brain evoked by the scale of visual attention with the cues of Chinese characters were studied by recording event-related potentials (ERPs). With the fixed orientation of visual attention, 14 healthy young participants performed a search task in which the search array was preceded by Chinese characters cues, “,” (large, medium, small). 128 channels scalp ERPs were recorded to study the role of visual attention scale played in the visual spatial attention. The results showed that there was no significant difference in the ERP components evoked by the three Chinese characters cues except the inferoposterior N2 latency. The targets evoked P2, N2 amplitudes and latency have significant differences with the different cues of large, middle and small, while P1 and N1 components had no significant difference. The results suggested that the processing of scale of visual attention was mainly concerned with P2, N2 components, while the P1, N1 components were mainly related with the processing of visual orientation information.

关 键 词：EVENT-RELATED potential visual spatial ATTENTION SCALE CUES of Chinese characters. 

分 类 号：B841[哲学宗教—基础心理学]