Hi Celine, I would probably map the annot to each individual subject using mri_surf2surf (see example 6). Then use mri_aparc2aseg to map it into the volume space (see subject/scripts/recon-all.log for the command used to generate aparc+aseg.mgz and then change the annot and the output filename).

You'll need to know the segmentation number for configuring the seed. To get this load the output into tkmedit, something like

tkmedit subject nu.mgz -opacity 1 -seg yournewseg.mgz -aux yournewseg.mgz

All the names will be messed up, but that is ok. Find the seg that you are interested in it. When you click on it, see the value presented for the aux in the control window. Pass this as -segid when you run fcseed-config and spec -seg yournewseg.mgz

doug

On 04/07/2014 03:15 PM, Celine Louapre wrote:

Hi Freesurfer team I am running a functional connectivity analysis on resting state data, and I would like to use as seed the precuneus/posterior cingulate region as seen on fsaverage/label/${hemi}.Yeo2011_17Networks_N1000.annot. However, this region is part of the label 17Networks_16 comprising other regions. Is it possible to isolate this specific portion of the label to create a seed region for the connectivity analysis ? I tried to do it on tksurfer, drawing a path around the region but then I could not figure out how to extract this part of the label. Thank you very much for your help Best Celine