[Mne_analysis] MNI to vertex?

Jon Houck jhouck at unm.edu
Sun Mar 9 12:00:04 EDT 2014
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Hi Alex,

I did, but I'm looking at sources not contained in the surface source space
(i.e., cerebellum).  All I really want to do is extract the raw source
timecourse for a given set of MNI coordinates, for use in time frequency
analysis, coherence, etc.  I suppose it would be possible to go through the
file with lcmv_raw and drop the vertices of no interest (≈99%) from each
time sample prior to saving, but that would be kind of a kludge.

For now it's just a handful of subjects, I can always do it in Graph with
an SSP as my spatial filter.

Thanks

Jon


On Sun, Mar 9, 2014 at 12:52 AM, Alexandre Gramfort <
alexandre.gramfort at telecom-paristech.fr> wrote:

> hi Jon,
>
> there is no support for labels/ROIs for volume source spaces.
> I would use freeview and freesurfer tools to explore volume estimates.
> Did you consider using a surface source space with LCMV?
>
> Alex
>
>
> On Sun, Mar 9, 2014 at 3:49 AM, Jon Houck <jhouck at unm.edu> wrote:
> > What's the best way to get the vertex number nearest to a set of MNI
> > coordinates in a volume source space?  The functions for volume source
> > spaces (e.g, tf_lcmv) expect labels but I'm not sure how to construct a
> > label for a region outside of the cortical sheet, other than simply
> filling
> > in the vertex numbers.
> >
> > Thanks
> >
> > Jon
> >
> >
> >
> >
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