The strength of the dipoles in the present source space was altered over time, but the orientation and location remained stable. A realistic three-shell head model (scalp, skull, and brain) was applied to calculate dipole activities. The conductivity values were 0.33 S/m, 0.0042 S/m, and 0.33 S/m for the scalp, skull, and brain compartments, respectively, and the compartments were assumed to be isotropic in ASA source reconstruction.
