[Mne_analysis] mne_eximia2fiff: digitizer data ordering

[Matti Hamalainen]

Hi Niko,

It looks like the electrode numbers are taken from the Eximia digitization file (see the mne_eximia2fiff script). You can confirm this by creating an EEG layout file for mne_browse_raw using mne_make_eeg_layout, and seeing where the channels end up.

- Matti

On Mar 26, 2013, at 9:10 AM, Mäkelä Niko wrote:

> Hi,
> 
> I am using the function mne_eximia2fiff with the '--dig' option containing the digitizer data. My EEG data is measured with the Nexstim eXimia system. 
> 
> Example:
> mne_eximia2fiff --dig <digitizer_data>.nbe <eeg_data>.nxe 
> 
> Do the EEG channels have to be digitized in the numerical order (from channel 1 to channel 60), or does the function correct the electrode ordering if the digitization was done in a 'random' order, for example, if channel 35 was digitized last? If the numerical ordering is required then I just need to change the electrode ordering manually, which takes a while.
> 
> Thank you!
> 
> Best regards,
> Niko Mäkelä
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> 



---------

Matti Hamalainen, Ph.D.
Athinoula A. Martinos Center for Biomedical Imaging
Massachusetts General Hospital

msh at nmr.mgh.harvard.edu
mhamalainen at partners.org






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