Dear FreeSurfer team,

I'm intrested in the segmentation of Corpus Callosum and in the volumes of its subregions.

Freesurfer divides the Corpus Callosum in 5 subregions but I have noticed an inconsistency in the boundary that separates the anterior part from the middle anterior one. 

In particular, the Rostrum is sometimes included in the anterior part, but other times it is included in the middle anterior part, as you can see comparing the two screenshots that I've attached.

How much can I consider this parcellation to be reliable?

Thank you,

Alessia Giuliano