Coherence and dipole

[jan-mathijs schoffelen]

Dear Rodolphe,

I guess you are analyzing EEG data? What reference electrode(s) did
you use?

Best,
JM



On Oct 22, 2010, at 1:47 AM, Rodolphe wrote:

> Dear Fieldtrip users,
>
> I recently run a coherence analysis on my data and i plotted a
> beautiful Topographic plot showing a strong coherence between one
> electrode in left parietal ( P5) and some right frontal electrodes.
> The thing is, when i try with the right parietal equivalent ( P6 )
> then i find a coherence with left frontal. Ans so on with a couple
> of other electrodes use as ref channels.
> As this symmetry looks awkward to me, is any of you have an idea of
> a posible artifact that can cause this, or a possible bias in the
> analysis? ( I tripled checked my code)
>
> Best,
>
> Rodolphe N., Ph.D.
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Dr. J.M. (Jan-Mathijs) Schoffelen
Donders Institute for Brain, Cognition and Behaviour,
Centre for Cognitive Neuroimaging,
Radboud University Nijmegen, The Netherlands
J.Schoffelen at donders.ru.nl
Telephone: 0031-24-3614793

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You are receiving this message because you are subscribed to
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between  users of the FieldTrip  toolbox, to share experiences
and to discuss  new ideas for MEG and EEG analysis.
See also http://listserv.surfnet.nl/archives/fieldtrip.html
and http://www.ru.nl/neuroimaging/fieldtrip.
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