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Have you looked at https://secure-web.cisco.com/1NC9Ltlp5uFU4Bul7SCRlbytQ23JMTs-YMiQzOu_NzomIa6... ? In theory you can use the ROI values in the ?h.aparc.stats file. But the atlas was not created in a symmetrical way, so their might be biases. Not that that has ever stopped anyone in neuroimaging.

On 7/3/2023 1:07 PM, Carlos Alcocer wrote:

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Thank you. I guess I am still confused on how to actually get results to visualize. I would like to assess left-right hemispheric cortical asymmetry . Ideally, i would like the analysis to be paired (ie. L vs R for each subject, rather than the average of L vs average of R across subjects). How would I go about analyzing and visualizing this in freesurfer using xhemi. Also is there a way to this with a ROI rather than the whole brain?

Thanks,

Carlos

On Tue, Jun 20, 2023 at 9:26 AM Douglas N. Greve dgreve@mgh.harvard.edu wrote:

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That map is whatever you are studying. Eg, lh.thickness

On 5/25/2023 1:30 PM, Carlos Alcocer wrote:

...

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Hello,

I am trying to do an asymmetry analysis using steps detailed in
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However, step 1.3 starts with running:

mris_apply_reg --src lh.map.mgh --trg lh.map.lh.fsaverage_sym.mgh
--streg $SUBJECTS_DIR/subject/surf/lh.fsaverage_sym.sphere.reg
$FREESURFER_HOME/subjects/fsaverage_sym/surf/lh.sphere.reg

What is this lh.map.mgh file? and where can I find it/how can i
make it?

Thank you,

Carlos




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