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Hi Douglas,

Thanks a lot for your kind explanation!

With regards Vittal

On Thu, Dec 17, 2020 at 8:12 PM freesurfer-request@nmr.mgh.harvard.edu wrote:

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Today's Topics:

1. Re: HCP_1200 parcellation problems (Greve, Douglas N.,Ph.D.)
2. Re: need assistance to decode QDEC results (Greve, Douglas N.,Ph.D.)
3. Re: Cortical thickness volume ROI to surface {Disarmed} (Greve, Douglas N.,Ph.D.)
4. Re: Error in selxavg3-sess (Greve, Douglas N.,Ph.D.)
5. Re: cannot find freesurfer/average/RB_all_2008-03-26.gca with -use-gpu in v5.3 (Greve, Douglas N.,Ph.D.)
6. Re: cannot find freesurfer/average/RB_all_2008-03-26.gca with -use-gpu in v5.3 {Disarmed} (Caspar M. Schwiedrzik)
7. Re: group analyses {Disarmed} (Greve, Douglas N.,Ph.D.)

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Message: 1 Date: Thu, 17 Dec 2020 14:28:37 +0000 From: "Greve, Douglas N.,Ph.D." DGREVE@mgh.harvard.edu Subject: Re: [Freesurfer] HCP_1200 parcellation problems To: "freesurfer@nmr.mgh.harvard.edu" freesurfer@nmr.mgh.harvard.edu Message-ID: 786b64c3-2d99-06ed-2fe3-812225238514@mgh.harvard.edu Content-Type: text/plain; charset="utf-8"

Sorry, I can't tell from your email what the problem is. Can you elaborate?

On 12/9/2020 2:30 PM, najme soleimani wrote:

    External Email - Use Caution

Dear FreeSurfer Developers, I downloaded the HCP_1200 subjects' structural extended data. I am attempting to have equal sized parcellation on scale 100, so I used parcellation results of Desikan atlas and increased the parcels from 68 to 100. after obtaining split file, I run the following commands on FreeSurfer: mris_divide_parcellation subj lh aparc.annot splitfile Desikan100 mris_divide_parcellation subj rh aparc.annot splitfile Desikan100 mri_aparc2aseg --s subj --annot Desikan100 --old-ribbon --o $SUBJECTS_DIR/subj/mri/Desikan100.subj.mgz The interesting part is that after running this command some disconnectivity were seen in the parcels as it is shown in the picture. In 3D view, also, when the parcels were loaded on dsi studio, there were some holes on the parcels which caused disconnected parcels. I will appreciate if you help me to solve this problem.

kind regards, Najme

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