Finite Difference anisotropic formulations for the EEG forward problem

In this paper we describe a new finite-difference method (FDM) EEG forward problem formulation which accounts for anisotropy of the various head tissues in the volume conductor model of the head. Our proposal, being based on FDM, derives the head model directly from patient’s specific clinical images. We present here the numerical FD formulation and the comparison of the proposed method with a previously developed FD formulation with respect to known analytical results, using a multi-shell anisotropic head model with skull anisotropy. Furthermore, we analyzed also different numerical grid refinement and EEG source characteristics. The comparative analysis performed shows the validity of the proposed method.