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 --- Boris Bernhardt, PhD Max Planck Institute for Human Cognitive and Brain Sciences Stephanstr. 1a, 04103 Leipzig, Germany p: +(49) 341 9940 2658 e: bernha...@cbs.mpg.de http://www.cbs.mpg.de/~bernhardt
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