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Hello,
I’m new to Freesurfer and am trying to learn the steps to manually label some brain regions for use in source localization in MNE. So far my understanding is that I have to create label files which contain the list of coordinates for the vertices in each region, and a color lookup table which has a list of these labels and their corresponding RGB values for display. However, there are a few pieces missing in my understanding. How would I create the label files for each brain region? For example, if I wish to combine several regions found in the Desikan-Killiany atlas, how would I get from the label files generated via ?h.aparc.annot to new label files combining several labels? Also, in order to create a source space in MNE I need a single segmented .mgz output such as aparc.a2009s+aseg.mgz. If I create a new .annot based on my new label files and lookup table, how would I obtain this volume?
Thank You!