1. A method comprising: modeling neural activity as single equivalent current dipoles (ECD's); calculating best fit dipole coordinates for each dipole; calculating a field distribution based on the best fit dipole coordinates; modifying the best fit dipole coordinates to create modified dipole coordinates; calculating a modified field distribution based on the modified dipole coordinates; computing a difference between the field distribution and the modified field distribution; computing a confidence interval for each dipole based on the difference between the field distribution and the modified field distribution; and displaying the confidence interval in an overlay on a three-dimensional image obtained through the use of either magnetic resonance imaging (MRI) or computerized tomography (CT).