Hello FreeSurfer experts, 

I want to perform a whole brain volume based group analysis for cortical and subcortical regions. That's something very similar to surface based group analysis for cortical thickness however, for volume. Is there a tutorial on how to do it? if yes, please can i get the link. If not, please can someone direct me how to go about doing it? My goal is to perform a group comparison between control and PD patients based on volume. Thank you very much. 

Best, 
Paul