Hi Meike

sorry for the delayed response. For the ventricular stuff you are probably better off contacting the CMA (Dave Kennedy, Nikos Makris, Verne Caviness). The inf-lat-vent is the part of the ventricle in the medial temporal lobe (the temporal horn), but they could provide a more exact description.

For the cc divisions, we split it up into fix equal length segments along its primary eigenaxis. This is arbitrary and you could change it by changing the way mri_cc is called.

cheers Bruce

On Fri, 2 Sep 2011, mschwei1@gwdg.de wrote:

Hello,

as I am interested in the volume of ventricular structures in the brain, I would like to more precisely understand the labels given by /stats/aseg.stats in Freesurfer.

Most importantly, what is the precisely defined difference between Left-Lateral-Ventricle and Left-Inf-Lat-Vent? Would you always combine these two in a volumetric study? Why are they separately segmented? And what exactly is the 5th-Ventricle? Less importantly, how exactly do you define CC_Posterior, CC_Mid_Posterior, CC_Central, CC_Mid_Anterior, and CC_Anterior?

Is there a paper or homepage defining these exactly? Any help appreciated!

Thanks a lot, Meike

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