Hi,

I couldn't find the documentation for mri_preproc. I know that roughly it resamples multiple subjects' brain images into the same space and then concatenates the vertices, but I want to know details like:

Exactly how are the brains resampled? What is the procedure beyond the Talairach affine and spherical registration steps? Individual brain images have different numbers of vertices. Which vertices are chosen overall? How are they chosen? How is correspondence between a single vertex location across all the images established?

Is the finite element approximation and vertex selection procedures invariant? Do they yield the same set and location of vertices despite minor variations? Under what conditions are they invariant?

After the vertices are obtained how are they concatenated? Are they listed in a particular order and is this order the same for all the brains? How is the order determined?

Thanks in advance for your reply, ~Jen