[Mne_analysis] vertex coordinates
Rezvan Farahi
rezvan.farahi at gmail.com
Thu Jan 7 20:19:45 EST 2016
Thanks a lot Dan, very helpful suggestions.
On Fri, Jan 8, 2016 at 1:02 AM, dgw <dgwakeman at gmail.com> wrote:
> I would recommend another technique for a couple of reasons:
>
> 1. The numbering system only has a rough correspondence for many
> vertices and can be wildly off for others. (which makes that more
> difficult)
>
> 2. actually calculating a fit that makes sense is extremely difficult
> and is exactly what FreeSurfer is designed to do, which is what the
> purpose of the morphing options in mne are designed to take advantage of.
>
> So experimenters can morph to an individual (either from your experiment
> or fsaverage, or an average from your experiment). Then extract the data
> from similar labels in the annotations.
>
>
> If those don't fit your needs and the experimenter truly wants the
> contralateral non-functionally defined region (this is very specific to
> the region and reasons that the experimenter is interested in it), then
> look into the xhemi work (Doug Greve is the major developer of it) found
> here:
> http://surfer.nmr.mgh.harvard.edu/fswiki/Xhemi
>
> This page has a link to the paper which should be read.
>
> Note, that there is a separate fsaverage_sym which is different from
> fsaverage (this may mean it is not safe to assume the numbering is
> symmetrical, though this would be a question for the freesurfer list). I
> think if you want true symmetry between the surfaces this is the
> technique to apply. Think carefully though before going down this road:
> real brains are not symmetrical, so in many cases it will not make sense
> to head down that road.
>
> hth
> d
>
>
>
> On 1/7/16 7:21 PM, Rezvan Farahi wrote:
> > Yes, absolutely not for single subjects; there the numbering is in the
> > original space and not in the downsampled space and not equal number of
> > vertices for the two hemispheres.
> > For the stc files defined in the downsampled space there seems to be a
> > rough correspondence.
> > Is there a way I can accurately find the mirror vertices?
> >
> > Thanks,
> > Rezvan
> >
> >
> > On Fri, Jan 8, 2016 at 12:15 AM, dgw <dgwakeman at gmail.com
> > <mailto:dgwakeman at gmail.com>> wrote:
> >
> > It is important to note: while this may be true for fsaverage (I
> haven't
> > done a check of this) it is definitely NOT true for any individual
> > participant's brain.
> >
> > hth
> > d
> >
> > On 1/7/16 7:12 PM, Rezvan Farahi wrote:
> > > Sorry, my bad, sorted. the location for 0 does pair with 10242, 1
> with
> > > 10243 and so on... thought had checked this before.
> > >
> > > On Thu, Jan 7, 2016 at 11:48 PM, Rezvan Farahi <
> rezvan.farahi at gmail.com <mailto:rezvan.farahi at gmail.com>
> > > <mailto:rezvan.farahi at gmail.com <mailto:rezvan.farahi at gmail.com>>>
> wrote:
> > >
> > > Hi all,
> > > I was wondering, for source estimates in the fsaverage space,
> is
> > > there a quick way of determining the mirror vertices
> bilaterally?
> > > (e.g.vertex 0 is in the left hemisphere, what's the opposite
> in the
> > > right?)
> > > Sorry if it's explained somewhere in the tutorials, hadn't
> come across.
> > >
> > > Many thanks,
> > > Rezvan
> > >
> > >
> > >
> > >
> > > _______________________________________________
> > > Mne_analysis mailing list
> > > Mne_analysis at nmr.mgh.harvard.edu
> > <mailto:Mne_analysis at nmr.mgh.harvard.edu>
> > > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis
> > >
> > >
> > > The information in this e-mail is intended only for the person to
> > whom it is
> > > addressed. If you believe this e-mail was sent to you in error
> > and the e-mail
> > > contains patient information, please contact the Partners
> > Compliance HelpLine at
> > > http://www.partners.org/complianceline . If the e-mail was sent
> > to you in error
> > > but does not contain patient information, please contact the
> > sender and properly
> > > dispose of the e-mail.
> > >
> > _______________________________________________
> > Mne_analysis mailing list
> > Mne_analysis at nmr.mgh.harvard.edu
> > <mailto:Mne_analysis at nmr.mgh.harvard.edu>
> > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis
> >
> >
> >
> >
> > _______________________________________________
> > Mne_analysis mailing list
> > Mne_analysis at nmr.mgh.harvard.edu
> > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis
> >
> >
> > The information in this e-mail is intended only for the person to whom
> it is
> > addressed. If you believe this e-mail was sent to you in error and the
> e-mail
> > contains patient information, please contact the Partners Compliance
> HelpLine at
> > http://www.partners.org/complianceline . If the e-mail was sent to you
> in error
> > but does not contain patient information, please contact the sender and
> properly
> > dispose of the e-mail.
> >
> _______________________________________________
> Mne_analysis mailing list
> Mne_analysis at nmr.mgh.harvard.edu
> https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20160108/89cb8347/attachment.html
More information about the Mne_analysis
mailing list