Application of Small-World Measures to Multichannel Event-Related Potential Activity during Generation of Global and Local Imagery  

作　　者：隋丹妮 赵庆柏 唐一源 

机构地区：[1]Institute of Neuroinformatics and Laboratory for Brain and Mind, Dalian University of Technology, Dalian 116024 [2]School of Psychology, Huazhong Normal University, Wuhan430079 [3]Department of Psychology, University of Oregon, Eugene, OR 97403, USA

出　　处：《Chinese Physics Letters》2010年第1期282-285,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China 60971096, and the New Century Excellent Talent Project （NCET） of the Ministry of Education of China under Grant No 06-0277.

摘　　要：The Small world model has been successfully used to explore the abnormal pattern of brain information processing in some neuropsychiatric diseases, but not engaged in the study of cognitive functions. We apply the small-world measures： the clustering coefficient and average path length, to evaluate multi-channel event-related potential activity during the generation of global and local imagery. Results show that the brain functional networks of the global and local imagery generation are both small-world ones. In addition, the local imagery generation has a larger clustering coefficient, while the global imagery generation has a shorter average path length. These results support the global precedence in the global-local imagery generation, and reflect the different processing modes in which global imagery emphasizes particularly on global integration, while local imagery on local specialization. Our results indicate that small-world measures could be applied to quantify the difference of brain activities in different cognitive tasks, and further provide some explanations for cognitive behavior.The Small world model has been successfully used to explore the abnormal pattern of brain information processing in some neuropsychiatric diseases, but not engaged in the study of cognitive functions. We apply the small-world measures： the clustering coefficient and average path length, to evaluate multi-channel event-related potential activity during the generation of global and local imagery. Results show that the brain functional networks of the global and local imagery generation are both small-world ones. In addition, the local imagery generation has a larger clustering coefficient, while the global imagery generation has a shorter average path length. These results support the global precedence in the global-local imagery generation, and reflect the different processing modes in which global imagery emphasizes particularly on global integration, while local imagery on local specialization. Our results indicate that small-world measures could be applied to quantify the difference of brain activities in different cognitive tasks, and further provide some explanations for cognitive behavior.

关 键 词：Chinese climate network complex systems small world COMMUNITY 

分 类 号：TP391[自动化与计算机技术—计算机应用技术] TP338.8[自动化与计算机技术—计算机科学与技术]