Comparison between original EEG and source activity signal

[Davi1990 (Dave)]

@agramfort

lambda2 was default. I’ve seen someone has the same issue in the past:

Forward/Inverse modeling sanity checks

Objective I’m playing around with forward/inverse modeling in MNE and am trying to check the assumption: (1) kernel @ gain == I Where kernel is the prepared inverse operator kernel, gain is the leadfield matrix, and I is an identity matrix. By extension, I want to check that: (2) x == kernel @ gain @ x Where x is the original time series data. (2) is easier to check due to how MNE stores the leadfield matrix, but I need to obtain kernel and gain that satisfy (1) as well. Assumptions f…

Given the reasons for the differences you listed, any suggestions on how to retrieve the original EEG signal from a practical point of view?

Thanks