Hi Ian
we don't register to an individual subject - we register to a probabilistic atlas compiled from many subjects. The fsaverage subjects were also generated from that data so they are in register, but the actual atlas is a .tif file that you can find as the target of mris_register in your recon-all.log file
cheers Bruce
On Wed, 13 May 2020, Ian wrote:
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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
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Ian Hardingham