Local Laplacian Estimate on Spherical Head Surface  

作　　者：LAI Yongxiu LAI Yongxiu YAO Dezhong YAO Dezhong[1] 

机构地区：[1]Key Laboratory of Neurolnformation of Ministry of Education, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, China [1]Key Laboratory of Neurolnformation of Ministry of Education, School of Life Science and Technology, University of Electronic Science and Technology of China, Chengdu 610054, China

出　　处：《Chinese Journal of Electronics》2009年第4期681-685,共5页电子学报（英文版）

基　　金：This work is supported by the National Natural Science Foundation of China （No.30870655, No.60736029）.

摘　　要：Scalp Laplacian is the 2D Laplace oper- ation on the scalp surface potential. In the last thirty years, three approaches were developed for the Laplacian estimate. Among them, the moderate and global methods were both based on various potential interpolation func- tions for various head model, whereas the earliest and sim- plest local method, the difference approximation, was still based on a planar surface model. In this work, the lo- cal difference approximation approach was extended to a spherical surface model. The 2nd and 4th order approxi- mation were derived and a proportional coefficient differ- ence was revealed between the planar and the spherical surface models. This work provided the theoretical basis of the local difference approach for Laplacian on a spherical head surface.

关 键 词：Scalp Laplacian POTENTIAL Local differ- ence approach Spherical head surface. 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TM311.033[自动化与计算机技术—计算机科学与技术]