Hi Leila,

you can use the spherical coordinates, given by the (x,y,z) of the vertex on that subject's sphere.reg (or the lattitude, colongitude). Or you can use send_to_subject in tksurfer to look up the vertex index on the fsaverage sphere.reg if you want.

cheers, Bruce

On Tue, 10 Jul 2007, Leila BH wrote:

Hi

I am using the freesurfer Parcellation, modify the obtained parcels to have a small rois. To validate my parcels subdivision into small rois, I need to know the variation of some roi_gravity_centers. Do you think that with the vertex number on the sphere of a subject (after parcellation) is it possible to know the corresponding vertex number in the template (Atlas) sphere ?

In other words, from the annotatation file which is basically ?h.aparc.annot where I modified some labels is it possible to have the correspondence on the Atlas sphere (using the vertices and sphere.reg or other)?

Thanks