Three-layer-isotropic skull conductivity representation in the EEG forward problem using spherical head models

E. Cuartas-Morales, Hans Hallez, Bart Vanrumste, G. Castellanos-Dominguez
2014 2014 36th Annual International Conference of the IEEE Engineering in Medicine and Biology Society  
We investigate influence of different conductivity models within a framework of electroencephalogram (EEG) source localization on white matter and skull areas. Particularly, we investigate five different spherical models having either isotropic or anisotropic conductivity for both considered areas. To this end, the anisotropic finite difference reciprocity method is used in solving the EEG forward problem. We evaluate a numeric skull conductivity modeling, in terms of the minimum dipole
more » ... tion/orientation error. As a result, two skull models reach the lowest dipole localization error (less than 6 mm), namely, single anisotropic layer and three isotropic layers (hard bone/spongy bone/hard bone). Additionally, two different electrode configurations (10 − 20 and 10 − 10 electrodes) are tested showing that the error decreases almost twice for the latter one, although computational burden significantly increases.
doi:10.1109/embc.2014.6944723 pmid:25571091 dblp:conf/embc/Cuartas-Morales14 fatcat:x7yeeiv6urb3xb3k6msbbr7z34