Hello Freesurfer-experts,

I just analyzed some FreeSurfer cortical thickness data that have been surface-resampled to fsaverage (using mris_surf2surf with -s fsaverage). 

For the visualization and reporting of my findings, I have a two questions:

1. Is there anything that conceptually speaks against showing my results on non-inflated surfaces of fsaverage, such as the white matter surface, the pial surface, or even a mid-surface model? 

2. I have a couple of ROIs defined on the surface of fsaverage and want to report the surface area of a given ROI in mm^2.  Should I calculate the area of a ROI directly from the given surface of fsaverage, or to take the area computations from ?h.pial.avg.area.mgh/?h.white.avg.area.mgh which represent the averages of the individuals that went into fsaverage.  

I am asking because I was slightly unclear of the wiki-instructions: 
https://surfer.nmr.mgh.harvard.edu/fswiki/GroupAverageSurface
suggests to use ?h.pial.avg.area.mgh; 

on the other hand, the more recently edited
http://surfer.nmr.mgh.harvard.edu/fswiki/FsAverage
says that "The surface area of the new average subject (fsaverage) is that of a typical subject" 

I am using freesurfer 4.5.0. 

Hope my questions make sense and thank you very much for answering them, 
Boris 




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Boris Bernhardt, PhD
Max Planck Institute for Human Cognitive and Brain Sciences 
Stephanstr. 1a, 04103 Leipzig, Germany 

p: +(49) 341 9940 2658  
e: bernhardt@cbs.mpg.de
http://www.cbs.mpg.de/~bernhardt