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Table 2 A comparison of the different methods for solving Poisson's equation in a realistic head model is presented.

From: Review on solving the forward problem in EEG source analysis

Position of computational points surface volume volume volume
Free choice of computational points yes yes no no
System matrix full sparse sparse sparse
Solvers direct iterative iterative iterative
Number of compartments small large large large
Requires tesselation yes yes no no
Handles anisotropy no yes no yes