On 03/04/2016 10:06 PM, Bruce Fischl wrote:
what are you trying to achieve?
A per-subject ~10k vertex pial surface with a corresponding annot. We use it as a spatial domain for simulating neural activity; 150k vertices is too many for this purpose.
It might be easiest to use something like fsaverage5 as the downsampled surface. Then you would just map your subjects to fsaverage5 using the existing sphere.reg files
If I understand correctly, different subjects would then have identical cortical geometry, which isn't sufficient for our use case, as we are calculating the forward solution for EEG/MEG which can depend on the individual's cortical geometry.
Sorry if I've misunderstood your suggestion, I'm still a freesurfer noob.
Thanks, Marmaduke