After converting surface potentials to CSD, can the converted data be analyzed like surface EEG?
Laplacian-transformed EEG/ERP may be processed with any routine typically applied to surface potential EEG/ERP (i.e., referenced) data, which include high and/or low pass filter, fast fourier transform (FFT), baseline correction, averaging of epochs, etc. However, one has to keep in mind that CSD data are reference-free (i.e., data can not be converted back into surface potentials), which prohibits all post-processing transformations that involve a recording reference (e.g., rereferencing the data).
