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Hi guys.

After recon-all, the /surf/?h.sphere.reg file implies a registration has been performed to an "average" subject on a sphere.  Can you please tell me which subject this is?  Is it SUBJECTS_DIR/fsaverage?  If so, what is SUBJECTS_DIR/fsaverage/lh.sphere.reg a registration to?  If not, where can I find the subject that recon-all registers to?

Thanks,

Ian