High resolution EEG: I. simulations

Abstract

High resolution EEG methods based on the New Orleans spline Laplacinn and Melbourne cortical imaging algorithms are evaluated using simulated dipoles in four concentric spheres and finite element models of the head. The finite element models have realistic shapes and variable skull properties. Both methods arc shown to provide accurate estimates of cortical surface potcntial at scales down to about 2 or 3 cm when 64 or 118 electrodes are used. These approaches improve spntial resolution over that obtained with conventional EEG by a factor of about three.