[Eeglablist] DIPFIT: changing model template .loc file

David Towers dtowers at illinois.edu
Tue Feb 16 07:45:15 PST 2010


Ilya,
I did follow the suggestions with some success.  Within dipfit, I selected
"Custom Model", and entered all the default files used when selecting
"Spherical Four-Shell (BESA)" except for the "Model template channel
locations file".  For that, I put together a file based on the electrode
locations of our cap.  I've attached the file as an example (note we use a
59-channel cap with electrodes labeled "EEGX", where X is the number, plus
two VEOG channels).  Here's an example of the first few lines from our .elp
file:

58
     EEG       VEOG1     127.588      65.992      85.000
     EEG       VEOG2    -130.893     -69.140      85.000
     EEG        EEG1    -109.411      45.735      85.000
     EEG        EEG2    -104.947      70.431      85.000
     EEG        EEG3     102.967     -87.992      85.000
     EEG        EEG4     101.340     -67.224      85.000

There are 58 channels listed since the 59th channel is our reference.

-Dave

On Fri, Feb 12, 2010 at 6:00 PM, Ilya Adamchic <dr.ilya at yahoo.com> wrote:

> Dear David,
> I'm st
> Did it work with suggestions from Arno concerning using your own template
> .loc file?
> Could you please share your experience in creating a template .loc file and
> using it with spherical BESA model.
> As i understood from Arno's answer, one has to select a custom model and
> then add it in to the DIPFIT set up window as a "self made" template .loc
> file. Did it work in your case?
> I think i have similar situation with yours. I have EGI HydroCell custom
> coordinates for each patient and it takes to long to manually pair all my
> custom channels with a standard .loc file given in EEGLAB, it simply takes
> to much time.
> Did you use your own spherical coordinates file or some standard average?
> I think there are some files for EGI HydroCel in BESA, that one could use,
> but they are in Carthesian coordinates.
>
> Arno, is there possibly some other suggestion, how to quicker co-register
> 128 HydroCell channel location file (with electrodes marked E1-E129)?
>
> Thank you guys for your comments!
> Best regards,
> Ilya
>
>
>


-- 
David N. Towers, Ph.D.
University of Illinois, Urbana-Champaign
Psychology Department
603 East Daniel Street
Champaign, IL 61820
(217) 244-6085
dtowers at illinois.edu
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