Linear superposition errors in dsl using multiple time-points due to model misspecification

Under a 3-shell sphere to l-shell model misspecification, linear superposition errors in the fit dipole parameters were examined using a commonly-used DSL (Dipole Source Localization) method analyzing multiple time-points. Using multiple time-points in the DSL generally resulted in less superposition e m r than if only a single time-point was used. However, how much improvement can be achieved by using multiple timepoints, as compared with a single time-point, is a function of many factors, such as the location and orientation of the dipoles, and the relative magnitudes and overlap of the waveforms (Le., time-varying magnitudes) of the dipoles, as well as the model used in the fitting. We conclude that a DSL with model misspecification can contain insidious errors.