Dear Mr or Ms, Thanks a lot for your previous help! In freesurfer wiki, I notice the description of 'sulc', that is how far removed a particular vertex point on a surface is from a hypothetical "mid-surface" that exists between the gyri and sulci." I am still not quite clear about sulc and how it is calculated, could you recommend me the revelant paper on how to calculated it? Thanks, Best Regards yczhang
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