[Eeglablist] Importing Brain Vision Analyser coordinates

[Nikola Vukovic]

Hi Steve,

Thank you for your answer and the Fieldtrip hint! Indeed, the reason why I
was wondering about importing BVA files, is because I have individually
digitised electrode coordinates. Ideally, I would like to import these
separately, for precision's sake, but of course if there's no
straightforward way, I might just use the default locations.

Seeing as Brain Vision is a very popular suite in EEG research, it might be
good if EEGlab team would support their file format?

Best,
Nikola


On Mon, Sep 28, 2015 at 6:53 PM, Stephen Politzer-Ahles <
stephen.politzer-ahles at ling-phil.ox.ac.uk> wrote:

> Hi Nikola,
>
> Since your channels have standard 10-20 names (e.g. "F7", "Cz", etc.),
> then you might not need to import the locations; in the EEGLAB GUI, after
> you import a .vhdr file, if you then go to Edit > Channel Locations, you
> should be automatically prompted to use channel locations from  BESA
> template (from the dipfit plugin, I think), which fills in the standard
> locations based on the channel names. In my experience these locations are
> accurate if my Brain Vision workspace used the standard filenames; so if
> that solves your issue, then you might not need to import the bva file.
>
> If you still need to read the locations from a file, that might be tricky;
> I remember I had the same problem (but this was several years ago so I
> don't know if EEGLAB has changed since then in this regard). I believe (if
> I'm remembering correctly) what I did at the time was read the .vhdr file
> into Fieldtrip, and then use that to export the channel locations as an
> .sfp file, which then EEGLAB was able to read. Since that was a while ago,
> there may well be a more straightforward way now.
>
> Best,
> Steve
>
>
>
> ---
> Stephen Politzer-Ahles
> University of Oxford
> Language and Brain Lab, Faculty of Linguistics, Phonetics & Philology
> http://users.ox.ac.uk/~cpgl0080/
>
> On Mon, Sep 28, 2015 at 1:06 PM, Nikola Vukovic <vukovicnikola at gmail.com>
> wrote:
>
>> Dear EEGlab community,
>>
>> Has anyone managed to import Brain Vision Analyser channel locations into
>> eeglab? I have not been able to do so successfully. Here is a sample
>> channel file: http://jmp.sh/Y5s7HBt
>> As far as I know, BVA should save the locations in simple Radius Theta
>> Phi format.
>> Is there a way to make EEGlab support this file type?
>>
>> Many thanks,
>> Nikola
>>
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