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From: "Camerino, I.L. (Ileana)" I.Camerino@psych.ru.nl Date: Friday, 22 May 2020 at 14:27 To: "freesurfer@nmr.mgh.harvard.edu" freesurfer@nmr.mgh.harvard.edu Subject: Motion correction files contain 0 0 0 1

Dear Freesurfer developpers,

I performed tractography analyses by using tracula implemented in freesurfer version 6.0.

I am performing the quality check as suggested in: https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/TraculaOutputs. The problem is that all my motion files (for all subjects) contain the same values: 0 0 0 1.

I checked the archive but I could not find an answer to a similar question in there.

Please could you suggest me what went wrong? is it possible to recalculate only the motion estimation without having to run again recon all? Thank you in advance

Ileana Camerino

PhD candidate Donders Institute for Brain, Cognition and Behaviour Centre for Cognition