[Eeglablist] Getting BIOSEMI 128-channel ABCD labels into the 10-20 system

Cedric Cannard ccannard at protonmail.com
Wed Oct 13 08:50:41 PDT 2021


Hi,

Aren't they in the Cap_coord_alls.xlsx file from the Biosemi website (bottom of the page)?
https://urldefense.proofpoint.com/v2/url?u=https-3A__www.biosemi.com_download.htm&d=DwIFaQ&c=-35OiAkTchMrZOngvJPOeA&r=kB5f6DjXkuOQpM1bq5OFA9kKiQyNm1p6x6e36h3EglE&m=WZsE7prRL23Cw67ijbULXJO8sK1SNKKpK3H597MPEkw&s=iA2xtdswHg1d6aEk5YOb0N54K3aWrFnPO1cb2HvB1mc&e= 
There should be a tab for 128-channel with all the coordinates.

Cedric

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐

On Wednesday, October 13th, 2021 at 3:54 AM, Rafał Jończyk via eeglablist <eeglablist at sccn.ucsd.edu> wrote:

> Dear Clement,
>
> thank you! This indeed works great! Still, though, I haven't found all of
>
> the labels for the 128-channel Biosemi system (I only have the labels for
>
> 64 channels). This is not a big issue, but it would be nice to have all of
>
> the ABCD names re-labeled to follow the 10-5 electrode labels. If by any
>
> chance anyone has worked with 128-channel BIOSEMI and knows the labels, I'd
>
> be grateful (the 10-5 layout for 128-channel system in Fieldtrip does not
>
> seem to correspond to the BIOSEMI layout...).
>
> Best,
>
> Raf.
>
> Dr Rafał Jończyk
>
> Assistant Professor of Pragmatics
>
> Faculty of English | Adam Mickiewicz University | Poland
>
> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.researchgate.net_profile_Rafal-5FJonczyk&d=DwIFaQ&c=-35OiAkTchMrZOngvJPOeA&r=kB5f6DjXkuOQpM1bq5OFA9kKiQyNm1p6x6e36h3EglE&m=0Q7YsxzCLS3QznAkSjKECLBT9T43bIlqMeiRztTpGyw&s=UhbBPycj1pDiq-otym4-wOo6bEj_STSSLRVbCPXSGbc&e=
>
> Il giorno lun 27 set 2021 alle ore 20:26 Clement Lee cll008 at eng.ucsd.edu
>
> ha scritto:
>
> > Dear Rafal,
> >
> > Attachments generally don't make it through the EEGLAB mailing list so
> >
> > it's best to attach a link (e.g. after uploading to Google drive or other
> >
> > sharing site).
> >
> > I think I can help without seeing the picture though. One good way to
> >
> > rename channel names is using a script. I assume when you mention manually
> >
> > you have been using the "Edit Channel Info" GUI menu and clicking through
> >
> > one by one? Actually everything reflected in the EEGLAB GUI is stored in
> >
> > the `EEG` MATLAB variable. Channel labels are stored in
> >
> > `EEG.chanlocs.labels` and the syntax you want to use would be something
> >
> > like:
> >
> > [EEG.chanlocs.labels] = deal('Fz', 'Pz', 'Cz', ..., 'O2');
> >
> > where the right hand side argument for deal are the 128 channel names in
> >
> > order (e.g. in above example A1 is Fz and D32 is O2), comma separated and
> >
> > in string format. You would run that line in a script or in the command
> >
> > line after importing channel locations. To confirm the change worked you
> >
> > can either type `EEG.chanlocs.labels` into the command line, or view the
> >
> > channel info from the GUI as you have been.
> >
> > Hope that helps,
> >
> > Clement Lee
> >
> > Applications Programmer
> >
> > Swartz Center for Computational Neuroscience
> >
> > Institute for Neural Computation, UC San Diego
> >
> > 858-822-7535
> >
> > On Fri, Sep 24, 2021 at 9:04 AM Rafał Jończyk via eeglablist <
> >
> > eeglablist at sccn.ucsd.edu> wrote:
> >
> > > Dear all,
> > >
> > > I'm aware that importing Biosemi channel locations has been a recurring
> > >
> > > theme in the past on the list, and actually your insight has helped me a
> > >
> > > lot to make it work for my data. However, having imported the channel
> > >
> > > file
> > >
> > > (see the attached 2D plot image and the channel location file I've used),
> > >
> > > I
> > >
> > > still cannot come up with a quick and reliable method to rename the labels
> > >
> > > (other than doing it manually?) so that they follow the 10-20 system.
> > >
> > > Working with the ABCD system is odd and confusing.
> > >
> > > Has anyone worked with 128-channel Biosemi data and found a reliable
> > >
> > > solution to this issue?
> > >
> > > Best,
> > >
> > > Rafal
> > >
> > > Dr Rafał Jończyk
> > >
> > > Assistant Professor of Pragmatics
> > >
> > > Faculty of English | Adam Mickiewicz University | Poland
> > >
> > > https://urldefense.proofpoint.com/v2/url?u=https-3A__www.researchgate.net_profile_Rafal-5FJonczyk&d=DwIFaQ&c=-35OiAkTchMrZOngvJPOeA&r=kB5f6DjXkuOQpM1bq5OFA9kKiQyNm1p6x6e36h3EglE&m=VrKaUQKvpK9uH4AxIoo0oeHcYF0Ig72HjfOiqqIvnn8&s=02x-u_WiUHgVxiM6UBFTCLqF_t3rbJB4iFVmzxaRz70&e=
> > >
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