Title :
Forward and inverse methods in event related potential imaging using a resistor mesh model
Author :
Franceries, X. ; Doyon, B. ; Chauveau, N. ; Rigaud, B. ; Morucci, J.-P. ; Celsis, P.
Author_Institution :
Neurology Dept., INSERM, Toulouse, France
Abstract :
A spherical head model based on a resistor mesh is presented. Each resistor corresponds to the conducting electrical properties of a tissue volume. A current dipole is simulated by an electrical current source connected between two nodes in this mesh. The direct problem is solved and the accuracy of this model is evaluated in comparison with the analytical solution. The results show that the resistor mesh provides correct potential and scalp current density values. The model structure makes it easy to introduce conductivity heterogeneities such as stroke and skull anisotropy. First trials of an inverse method are also presented.
Keywords :
bioelectric potentials; brain models; electroencephalography; inverse problems; EEG; ERP; accuracy; analytical solution; conducting electrical properties; conductivity heterogeneities; current dipole; direct problem; electrical current source; electroencephalography; event related potential imaging; forward methods; inverse methods; potential values; resistor mesh model; scalp current density values; skull anisotropy; spherical head model; stroke anisotropy; tissue volume; Anisotropic magnetoresistance; Brain modeling; Conductivity; Current density; Electroencephalography; Head; Inverse problems; Resistors; Scalp; Skull;
Conference_Titel :
Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE
Print_ISBN :
0-7803-7211-5
DOI :
10.1109/IEMBS.2001.1020364
