Indeed the conversion from FreeSurfer annot format to GIFTI label format using 
FreeSurfer’s mris_convert does not preserve the probabilities (instead coloring 
every vertex with non-zero probability as a label).  Really though, FreeSurfer 
only provides those labels on individual subjects as a convenience.  If you 
want to compare the probabilistic areas in the HCP’s 32k_fs_LR space, you can 
use this file:

Sorry that this is all a bit confusing.  It also doesn’t appear that we have 
released these probabilistic cytoarchitectonic maps in an especially obvious 
way in the BALSA database, so we can try to do this.



 on behalf of Salim Arslan 
Date: Wednesday, August 9, 2017 at 2:33 PM
To: "<>" 
Subject: [SPAM] [HCP-Users] Brodmann area maps

Dear all,

Could you provide a precise description on how the Brodmann area maps provided 
with the structural data (label files titled e.g. 
100307.L.BA.32k_fs_LR.label.gii) are obtained? I am currently working on the 
HCP500 release.

My understanding is that they are obtained from freesurfer's recon-all command, 
however this should provide probabilistic maps (according to and not the hard 
labels that we are given. I have been looking through the HCP documentation and 
publications and could not find a precise explanation.

Any help would be greatly appreciated.

Best wishes,

HCP-Users mailing list<>

HCP-Users mailing list

Reply via email to