CONTINUOUS CURRENT SOURCE INVERSION OF EVOKED-POTENTIAL FIELDS IN A SPHERICAL MODEL HEAD

This study explores the efficacy of a physiological constraint on cort ical current generators in promoting a robust solution for the inverse problem in evoked potentials. It is proposed that the current sources responsible for the evoked potential be modeled as a set of dipoles o riented orthogonal to the surface of the cortex. Rather than using a m inimum norm approach, the solution space is searched for a vector that minimizes the error of the predicted evoked potential scalp field.