Surface Laplacian prior to source localization

Hi,

Can I perform surface Laplacian (current source density) and then do source localization using weighted min norm?

  • Priya

No, the minimum norm estimates requires the EEG in the original physical units.
The surface Laplacian can be used as a quick (and dirty) replacement for source localization, but it should not be applied prior to any more formal source modeling.
Use one or the other.