yes. All the surfaces for a given hemisphere share the same topology, meaning vertex ordering, edges and faces. On Thu, 19 Jan 2012, Peter Savadjiev wrote:

Thanks Bruce,

So I can be sure that the output of the mris_command will be stored in the same order as lh.curv, and I can parcelate it with lh.aparc.annot, no matter which surface I use?

Best, Peter

On 01/19/2012 10:46 AM, Bruce Fischl wrote:

...

Hi Peter you can do it on any of the surfaces for a given subject in the same hemisphere.

cheers Bruce On Thu, 19 Jan 2012, Peter Savadjiev wrote:

...

Hi,

In order to obtain the vertices of lh.curv that belong to a specific freesurfer cortical ROI, such as 'superiortemporal', or 'superiorfrontal', etc., I use the information in lh.aparc.annot, as described for example in http://surfer.mnr.mgh.harvard.edu/fswiki/AnnotFiles/ .

However, now I am interested in looking at the principal curvatures in the same cortical ROI. To obtain the principal curvatures, I use

mris_curvature -max $SUBJECTS_DIR/caseXYZ/surf/lh.<some_surface> and mris_curvature -min $SUBJECTS_DIR/caseXYZ/surf/lh.<some_surface>

My question is, which surface should I use in<some_surface> so that I can still identify the vertices of interest using lh.aparc.annot?

In other words, how do I ensure that the output of the mris_curvature command has the surface vertices stored in the same order as lh.curv?

Any help will be much appreciated!

Thanks, Peter _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

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no, I think it's because the lh.curv is smoothed spatially On Thu, 19 Jan 2012, Peter Savadjiev wrote:

The reason I'm asking is because the mean of the principal curvatures thus obtained differs from the information stored in lh.curv, and I wasn't sure whether this is due to a different ordering of the vertices.

Best, Peter

On 01/19/2012 10:51 AM, Peter Savadjiev wrote:

...

Thanks Bruce,

So I can be sure that the output of the mris_command will be stored in the same order as lh.curv, and I can parcelate it with lh.aparc.annot, no matter which surface I use?

Best, Peter

On 01/19/2012 10:46 AM, Bruce Fischl wrote:

...

Hi Peter you can do it on any of the surfaces for a given subject in the same hemisphere.

cheers Bruce On Thu, 19 Jan 2012, Peter Savadjiev wrote:

...

Hi,

In order to obtain the vertices of lh.curv that belong to a specific freesurfer cortical ROI, such as 'superiortemporal', or 'superiorfrontal', etc., I use the information in lh.aparc.annot, as described for example in http://surfer.mnr.mgh.harvard.edu/fswiki/AnnotFiles/ .

However, now I am interested in looking at the principal curvatures in the same cortical ROI. To obtain the principal curvatures, I use

mris_curvature -max $SUBJECTS_DIR/caseXYZ/surf/lh.<some_surface> and mris_curvature -min $SUBJECTS_DIR/caseXYZ/surf/lh.<some_surface>

My question is, which surface should I use in<some_surface> so that I can still identify the vertices of interest using lh.aparc.annot?

In other words, how do I ensure that the output of the mris_curvature command has the surface vertices stored in the same order as lh.curv?

Any help will be much appreciated!

Thanks, Peter _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

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Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer

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