for the difference between the two cortical parcellations: aparc and aparc.a2009s, see:

http://surfer.nmr.mgh.harvard.edu/fswiki/CorticalParcellation

the +aseg files are those parcellations sampled into the volume, including the white matter, plus the aseg.

n.

On Mon, 2010-02-22 at 16:05 +0100, Mohammed el Morabit wrote:

Dear all,

I am using freesurfer to generate a parcellation on the cortex. The regions of this demarced cortex serve as ROIs in further research. My question is... what is the difference between aparc+aseg and aparc.a2009s+aseg? And which one should I use?

Thanx in advance

Morabit.

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