[Mne_analysis] MRI fiducials for EEG coregistration

[Eric Larson]

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>
> Now, I used the new function mne.coreg.get_mni_fiducials in version 19.
> But the detected fiducials do not match the ears and nose *visually* on the
> reconstructed head shown on the GUI of mne.gui.coregistration(). There is a
> fuction in brainstorm which finds the fiducials automatically based on
> template head. Thant function also did not work properly for my data.
> I tested the function for the sample head of mne_data, the fiducials from
> get_mni_fiducials match visually on the head of mne.gui.coregistration().
>
> Does anyone have similar experiences or suggestions?
>

You can manually mark the fiducial locations in `mne coreg` by clicking
"edit" in the left panel, then one of the LPA/Nasion/RPA boxes.

The automated approach should be pretty good assuming your talairach
Freesurfer transformations are correct for the subject. If they are not, it
might be worth doing them manually (see
https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/Talairach_freeview),
then proceeding to re-do the recon-all steps that follow the Talairach
registration process (somewhere in the middle of autorecon1 here:
https://surfer.nmr.mgh.harvard.edu/fswiki/ReconAllDevTable). If you choose
to go this route and hit trouble, it's worth pinging the Freesurfer
listservs.

Eric
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