Hi Jeremy,

I have actually not carried out any analysis yet but I suggest you do your multiple comparison thresholding using the number of voxels that encompass the zone you are using for the mapping. That zone would be the gray matter for example if you were mapping voxels between white and pial matter surfaces.
You can get this number by calculating the volume of the intersection using Rick's latest and greatest SurfMeasures with the -info_vol option (I just looked it up, the guy adds options every minute! ).

By the way, when you are following up on a thread that's too old, I suggest yo u start with a new posting. Also, nice web-site design.

Cheers,
-ziad