[Mne_analysis] Correcting EEG electrode's locations on mne_analyze
Matti Hamalainen
msh at nmr.mgh.harvard.edu
Tue Apr 20 14:40:04 EDT 2010
Hi Andres,
On Apr 20, 2010, at 2:35 PM, Andres Felipe Salazar Gomez wrote:
> Hi MNE users,
>
> I am trying to visualize the real locations for EEG electrodes on
> mne_analyze using the viewer. I can see the electrodes on the scalp
> surface but not the real distance of each electrode to it. I am
> trying to
> check that my electrodes were correctly digitized and wanted to know
> if
> there is a way to correct their locations in case such a problem
> occurs.
When you do the coordinate system alignment, the electrode locations
are also shown but not with a different color, unfortunately.
For the forward calculation, the electrodes are dropped to the nearest
point on the scalp surface so that slight error in the digitization
should not be a big problem, especially because the EEG patterns are
quite widespread.
- Matti
---------
Matti Hamalainen, Ph.D.
Athinoula A. Martinos Center for Biomedical Imaging
Massachusetts General Hospital
msh at nmr.mgh.harvard.edu
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