[FieldTrip] Virtual EOG Channel

[Elmeri Syrjänen]

Hi,

here is some code that works well for me:

% Create a virtual channel of frontal electrodes for finding eye-blinks

    cfg = [];

    cfg.layout = 'biosemi128.lay';

    cfg.channel = {'C30', 'C29', 'C17', 'C16', 'C8'};

    EOGdata = ft_preprocessing(cfg, ERPdata);


    cfg = [];

    cfg.avgoverchan = 'yes';

    EOGdata = ft_selectdata(cfg, EOGdata);

    EOGdata.label = {'EOG'};



/elmeri

On Mon, Aug 3, 2015 at 8:02 AM, Schoffelen, J.M. (Jan Mathijs) <
jan.schoffelen at donders.ru.nl> wrote:

> Hi Lindsey,
>
> You might want to have a look at some parts of the following page:
> http://www.fieldtriptoolbox.org/example/preprocessing_eeg?s[]=rereferencing
> I think it contains the information that you are looking for.
>
> Best wishes,
> Jan-Mathijs
>
>
> Jan-Mathijs Schoffelen, MD PhD, Senior researcher
>
> Max Planck Institute for Psycholinguistics
> Donders Centre for Cognitive Neuroimaging
>
> E-mail: j.schoffelen at donders.ru.nl
> Telephone: +31-24-3614793
>
> http://www.hettaligebrein.nl
> http://www.fieldtriptoolbox.org
>
>
>
> On Aug 1, 2015, at 1:29 AM, Tate, Lindsey R. <lindseyrtate at ou.edu> wrote:
>
> Hello community,
>
> My name is Lindsey Tate, and I'm a PhD student at the University of
> Oklahoma. I'm starting work on a project analyzing data that my mentor
> collected previously at another institution. This data includes EEG and MEG
> during a saccade and anti-saccade task. My mentor previously used BESA
> which I have no access to currently but may have limited access to in the
> future. She explained that when they collected the data they didn't collect
> EOG channels to measure eye movements because these movements can be picked
> up by other channels, and in BESA there is a short process to creating a
> "virtual EOG" channel from the other/nearby channels. I can't find any
> documentation of someone doing this outside of BESA.
>
> Has anyone ever done this before in FieldTrip? If so, how did you do it
> and how were the results? If not, do you have ideas about how you could do
> such a thing?
>
> Thank you in advance for any help or advice you can offer,
> Lindsey
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