[FieldTrip] Re-reference data with EOG and heart electrodes

Tue Jul 1 11:30:14 CEST 2025

Thank you so much for the quick reply.
Given that:
cfg = [];
cfg.reref = 'yes';
cfg.refmethod = 'avg';
cfg.refchannel = {'EEG','-EOG,','-EKG'};

then:
data = ft_preprocessing(cfg);

and what about the EOG and EKG channel? do I need to re-reference them to
themselves an then append them back to the processed EEG data? or it's not
necessary?

Thanks,
Jasmine

Il giorno mar 1 lug 2025 alle ore 11:22 STEPHAN MORATTI via fieldtrip <
fieldtrip at science.ru.nl> ha scritto:

> Dear Jasmine,
>
> Of course you should take care that your EOG and ECG channels are not
> included during re-referencing to average. Normally, your EOG and ECG
> channels should be defined as those and not figure as EEG channel type.
> This depends on your set up when you record. If so, the following should do:
>
> cfg = [];
> cfg.reref = 'yes';
> cfg.refmethod = 'avg';
> cfg.refchannel = {'EEG'};
>
> If your ECG and EOG channels are not defined as different channel type
> (let's assume they are also defined as EEG channels and you have used TP9
> and TP10 as ECG and F2 and F3 as EOG channels), the the following should do:
>
> cfg = [];
> cfg.reref = 'yes';
> cfg.refmethod = 'avg';
> cfg.refchannel = {'EEG','-TP9,','-TP10','-F2','-F3'};
>
> Best,
>
> Stephan
>
>
> El lun, 30 jun 2025 a las 14:49, Jasmine Pani via fieldtrip (<
> fieldtrip at science.ru.nl>) escribió:
>
>> Hello all,
>>
>> I'm super new to fieldtrip and I'm currently trying to write a script to
>> analyze a single subject.
>> I have a brain products 32 channel eeg cap with two electrodes that can
>> be used to record eye movement and heart rate.
>> In the pre-processing I'm re-referencing the data to avg, I was wondering
>> about these two no-brain electrodes. Should I include them and reference,
>> or remove them, reference and then include them back??
>>
>> I'm sorry if the question is really basic.
>> Best,
>> Jasmine Pani
>>
>> Post-doc
>>
>>
>> UNIVERSITÀ DEGLI STUDI DI FIRENZE
>>
>> Dipartimento di Ingegneria Industriale (DIEF)
>> *Biomedical and Robotics Lab (**Stanze 344 - 345)*
>> *Viale Morgagni, 40 *
>> *50134 Firenze, Italia*
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>
>
> --
>
> Stephan Moratti, PhD
> Profesor de Psicología Experimental
> Departamento de Psicología Experimental
> Facultad de Psicología
> Center for Cognitive and Computational Neuroscience
> Universidad Complutense de Madrid
> smoratti at ucm.es
>
>
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