Dear Diane, You should use "EEG BEM". Vladimir On Thu, Jul 16, 2009 at 12:18 PM, Diane Whitmer<[log in to unmask]> wrote: > Dear Vladimir, > A small point of confusion from the EEG/MEG chapter of the SPM manual. > It recommends using the "3-shell BEM" for the EEG forward model. In the gui, > there are 2 options: "EEG BEM" or "3-shell sphere (experimental)". > Which of these two is the "3-shell BEM"? > Thanks, > Diane