Dear all,

I am creating new ROIs from MNI coordinates in Conn Toolbox. When defining the paramenters of the ROI, the last gap to fill is the ROI-file resolution. By default I have 2mm, but I would like to know

(1) which measure is usually recommended for this parameter; and 

(2) where this parameter for the ROI-file resolution come from, why is 2mm?

Thank you in advance!

Oihana