Hi Erik

you could map your data to one of the lower res fsaverage subjects. Probably fsaverage 5 or so (which is a 5th order icodahedron with about 10K vertices). Or you could use mris_make_face_parcellation. There also are some decimation tools around which you could use, maybe someone else remembers how to use them?

cheers Bruce

On Sat, 9 Jul 2016, ERIK JAHNER wrote:

Dear free surfer experts,

I am conducting a resting state fMRI study using a lagged analysis method. To do this method on a volume, I have used 6 mm cubes as rois covering the whole brain but masked for grey matter. I use these values in a correlation map.

I would like to do a similar approach here. Is there a way to get measurements ~6mm apart averaging the vertices 3 mm away. basically, I would like to parcel the cortex surface map into 6mm rois evenly distributed over the surface of the cortex. I would like to take advantage of the fact that I can take measurements along surfaces and not across sulci.

Is there an automated way or easy way of building this ROI map.

Erik Jahner _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer