Hi Surfers!
I have done a group level analysis relating a variable to thickness values. I have a sig.mgh file that shows the relationship between the variable and thickness at each vertex. Now I would like to threshold the sig.mgh file (at values of 3 and above), and then extract an average thickness value across this entire mask for all my subjects. I have been able to convert the sig.mgh to an annotation using mri_surfcluster, but this file contains multiple clusters when all I'd like is 1 mask. Once I get to this step, I assume there is a way to then extract thickness values using the thickness.mgh file originally fed into mri_glmfit, but can't seem to get this to work with mri_segstats. My solution has been moving the annotation back into each subject's space with mri_surf2surf, but this seems like a very round-about way of completing this analysis.
Thanks in advance! Beth