Hi everyone,

Is there any way to do ROI-based fixed effect group analysis in Freesurfer? I want to get the average ces and cesvar (fixed effect) in a specific ROI. Can I just average the gamma and gammavar that in the osgm folder after I ran the voxel-based ffx group analysis in that ROI to get those values, if I have a group data defined ROI? And how to average the gammavar in a ROI? Just mean(gammavar), or sqrt(mean(gammavar^2))?

Thanks very much for the answers.

regards,

Qi Zhu Laboratorium voor Neuro- en Psychofysiologie K.U.Leuven Medical School