The trial is designed to detect strength of spatial correlation between topographic maps of hand motor representation obtained through noninvasive nTMS compared to direct, extra-operative cortical stimulation obtained as part of usual clinical evaluation during epilepsy surgery, as measured by (a) average distance between positive motor mapping sites of DCS compared to nTMS and (b) degree of concordance between positive and negative motor mapping sites between DCS and nTMS, to generate positive and negative predictive values, and (c) average distance between positive motor functional sites of fMRI compared to nTMS.