[Mne_analysis] density of source space

[Daniel Wakeman]

Hi Pavan,

This is due to a safety check that MNE runs on the ico surfaces. You
can go all the way to 1mm spacing in the --spacing option (that is the
smallest spacing of FreeSurfer surfaces); however, with --ico you need
to pass that check. In my experience, I cannot get --ico to work
higher than 5 reliably. For much of my work I therefore use --spacing
1

HTH
D

On Thu, Dec 8, 2011 at 12:35 PM, Pavan Ramkumar <pavan at neuro.hut.fi> wrote:
> Hello MNE users,
>
> Is there an upper limit to the density of a surface-based source space? I
> tried to use '--ico 6' but end up with the following error (below). Any
> comments are appreciated!
>
> Thanks and best regards,
> Pavan
>
> Mapping lh canonical_spm -> ico (6) ...[done]
> Source space vertex moved from 122918 to 122919 because of double occupation.
> Source space vertex moved from 115207 to 115208 because of double occupation.
> Source space vertex moved from 126414 to 126427 because of double occupation.
> Source space vertex moved from 127512 to 128573 because of double occupation.
> Source space vertex moved from 122931 to 122932 because of double occupation.
> Source space vertex moved from 67868 to 67881 because of double occupation.
> Source space vertex moved from 120280 to 121558 because of double occupation.
> Source space vertex moved from 111346 to 111345 because of double occupation.
> Source space vertex moved from 127458 to 127465 because of double occupation.
> Source space vertex moved from 130733 to 130732 because of double occupation.
> Source space vertex moved from 122893 to 122912 because of double occupation.
> Source space vertex moved from 124127 to 125309 because of double occupation.
> Source space vertex moved from 125309 to 125310 because of double occupation.
> Source space vertex moved from 122914 to 122915 because of double occupation.
> vertex 122915 is in the map multiple times.
> Cannot continue
> Source space creation failed
> Temporary files removed.
>
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