Thanks for the reply...
I know that that figure was made by SUMA. My question was not about creating a surface model.
My question was how can I make a group analysis and obtain a group map separetly for finger1_pre and finger1_post? I mean... how can I obtain a group map for one condition (e.g. finger1_pre) with no comparison between conditions (e.g pre vs post)? I need to demonstrate the deactivation by comparing group maps (and percent signal changes) between finger1_pre and finger1_post.
Thanks in advance