Hello Yang,
I am not sure how familiar you are with the process of mapping functional data onto the surface models with SUMA. For MEG data it is the same process, alignments are carried out through the high-resolution anatomical MRI scans.
I suggest that you first have your MEG data aligned to your high resolution anatomical data (call that volume ExpAnat).
Then use the script @SUMA_AlignToExperiment to align the volume from which the surface was created (call it SurfVol) to ExpAnat. If that alignement works then your MEG data or other functional data can be mapped to the surface using afni or 3dVol2Surf.
These processes are documented at greather length here:
[
afni.nimh.nih.gov]
cheers,
-ziad
