摘要
神经元所产生的脑内电活动通常可用电流源偶极子来模拟。讨论用有限元法计算电流源偶极子产生的电流与电位分布 ,推导出计算偶极子源在各向异性导电媒质中的有限元方程 ,并对其进行变形 ,使得在各向异性导电媒质中生成的有限元刚度阵对称。这一算法已应用于媒质各向异性的真实头模型脑电计算 ,得到了较为满意的结果。
The current dipoles can be adopted to simulate the nerve sources in human brains. The electric current and potential distribution produced by dipoles in human brain was simulated by the finite element method. The finite element formula related to dipole sources and anisotropic media was derived. An approach for creating a symmetrical stiffness matrix of the finite element equation system in the computation of potential problems with anisotropic media was presented. In the simulation, the realistic shape of the head with anisotropic conducting media had been considered.
出处
《中国生物医学工程学报》
EI
CAS
CSCD
北大核心
2003年第3期208-214,共7页
Chinese Journal of Biomedical Engineering
基金
国家自然科学基金资助项目 (5 0 2 770 19
5 993 7160 )
关键词
各向异性
脑电
有限元法
Brain
Computer simulation
Electric currents
Finite element method
Neurology
