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Hello, Yes the problem is that there is an overlap between the premotor and motor area. Does FreeSurfer provide any other masks that can be used for the premotor area?
Thank you in advance, Evie
From: freesurfer-bounces@nmr.mgh.harvard.edu freesurfer-bounces@nmr.mgh.harvard.edu on behalf of Douglas N. Greve dgreve@mgh.harvard.edu Date: Friday, December 10, 2021 at 3:43 PM To: freesurfer@nmr.mgh.harvard.edu freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] Definition of Premotor Area
CAUTION - EXTERNAL EMAIL:Do not click links or open attachments unless you recognize the sender. Is the problem that there is an overlap? The exvivo labels and aparc labels are not going to be mutually exclusive. On 12/6/2021 5:34 PM, Tsolaki, Evangelia C. wrote:
External Email - Use Caution Hello Freesurfer Team, I am interested in using premotor, precentral gyrus and postcentral gyrus in my analysis. For the definition of the precentral gyrus and postcentral gyrus I use the following lines: fslmaths aparc+aseg.nii.gz -thr 1024 -uthr 1024 PreCG_L.nii.gz fslmaths aparc+aseg.nii.gz -thr 2024 -uthr 2024 PreCG_R.nii.gz fslmaths aparc+aseg.nii.gz -thr 1022 -uthr 1022 PostCG_L.nii.gz fslmaths aparc+aseg.nii.gz -thr 2022 -uthr 2022 PostCG_R.nii.gz
To define the premotor area I use the labels rh.BA6_exvivo.label and lh.BA6_exvivo.label according to the script below: bbregister --s SubID_FreeSurfer --mov nodif.nii.gz --reg lowb2orig.dat --dti --init-fsl mri_label2vol --label SubID_FreeSurfer /label/rh.BA6_exvivo.label --reg lowb2orig.dat --fillthresh .3 --hemi rh --subject SubID_FreeSurfer --o BA6_R.nii.gz --temp nodif.nii.gz --proj frac 0 1 .1
When I check the location of the resulted BA6 and precentral gyrus masks, there is an overlap. Could you please advise if there is any other way to define premotor area?
Thank you in advance, Evie
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