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The role of different cues.in the brain mechanism on visual spatial attention

Progress in Natural Science:Materials International 2006年第10期16卷 1045-1050页

作者： SONG Weiqun, LUO Yuejia, CHI Song, JI Xunming, LING Feng, ZHAO Lun, WANG Maobin and SHI Jiannong ( Department of Rehabilitation, Xuanwu Hospital, Capital University of Medical Science, Beijing 100053, China State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, China School of Psychology, Southwest University, Chongqing 400715, China Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing 100101, China Department of Neurology, Affiliated Hospital of Qingdao University, Medical College, Qingdao 266003, China Department of Neurology, Xuanwu Hospital, Capital University of Medical Science, Beijing 100053, China Institute of Linguistics, Xuzhou Normal University, Xuzhou 221116, China) Department of Rehabilitation Xuanwu Hospital Capital University of Medical Science Beijing 100053 China State Key Laboratory of Cognitive Neuroscience and Learning Beijing Normal University Beijing 100875 China School of Psychology Southwest University Chongqing 400715 China Key Laboratory of Mental Health Institute of Psychology Chinese Academy of Sciences Beijing 100101 China Department of Neurology Affiliated Hospital of Qingdao University Medical College Qingdao 266003 China Department of Neurology Xuanwu Hospital Capital University of Medical Science Beijing 100053 China Institute of Linguistics Xuzhou Normal University Xuzhou 221116 China

The visual spatial attention mechanism in the brain was studied in 16 young subjects through the visual search paradigm of precue-target by the event-related potential (ERP) technique, with the attentive ranges cued by different scales of Chinese character and region cues. The results showed that the response time for Chinese character cues.was much longer than that for region cues.especially for small region cues. With the exterior interferences, the target stimuli recognition under region cues.was much quicker than that under Chinese character cues. Compared with that under region cues. targets under Chinese character cues.could lead to increase of the posterior P1, decrease of the N1 and increase of the P2. It should also be noted that the differences between region cues.and Chinese character cues.were affected by the interference types. Under exterior interferences, no significant difference was found between region cues.and Chinese character cues. however, it was not the case under the interior interferences. Considering the difference between the exterior interferences and the interior interferences, we could conclude that with the increase of difficulty in target recognition there was obvious difference in the consumption of anterior frontal resources by target stimuli under the two kinds of cues.

关键词： visual spatial attention cue scale event-related potential (ERP) Chinese character cues region cues.

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