[Eeglablist] Rereferencing

[Soyoung Kwon]

Dear Neha,

How about using Pz-reference?
My group use Pz reference, and we re-reference it to average reference.

% Re-reference command line
EEG = pop_reref( EEG, [], 'refstate',-19); (in our lab, 19: Pz ch)
This upper command line is used for re-referencing the whole EEG.

At the moment, I don't remember which paper I'd cited, but there're lots of
paper who use Pz cause it's clear, not contaminated.
Besides, you can run ICA and remove some dominant artifact.
For instance, removing Eye-blinking IC helped for getting datasets with less
artifacts.

Hope it helps.

Regards,

Soyoung Kwon

-- 
Research Assistant,
Dep, of Neurology, Korea University Medical Center, Korea University College
of Medicine
126-1, 5-Ga, Anam-Dong, Sungbuk-Gu, Seoul 136-705, Korea

Tel 82-2-920-5984


On 2/8/08, neha bhutani <neha.brain at gmail.com> wrote:
>
> Dear all,
>
> I have some doubts regarding the referencing of the channels. I have come
> across many papers which have appreciated average reference while others
> have really criticized it. Some papers are taking linked earlobes as
> reference while some are using only ipsilateral ear lobe. Certain papers
> have referred to Laplacian or Hjorth transformatio regarding the referencing
> of the datasets.
> I'm working on saccade related potentials. I have tried linked earlobes
> and average referencing for my studies but the data seems to be very much
> contaminated with the saccade.
> So I'll be really glad if some one can suggest me which would be the best
> way of referencing in my dataset.
>
>
> Regards
>
> Neha Bhutani
> Graduate Student
> Cognitive Neuroscience
> National Brain Research Centre
> Manesar, India
>
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