Hi Anastasia, 
  I believe the issue I had with the pathstats.byvoxel.txt not displaying the last four values (AD_Avg RD_Avg MD_Avg FA_Avg
) is owing to the fact that trac-all was run with FREESURFER 5.1. I believe that FREESURFER 5.2 may be needed to generate path.pd.trk, and from that, the above values are derived. Is this correct? Thank you again, and have a good day!
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Susie Kuo

Mediocrity knows nothing higher than itself, but talent instantly recognizes genius. - Sir Arthur Conan Doyle, Sherlock Holmes- Valley of Fear