CTF275 coherence

[Pádraig Kitterick]

Yes, the radius of the sphere is not relevant to the calculations. The
presumtion is always that the measurement device is outside the sphere.

Padraig

Cristiano Micheli wrote:
> Thank you for the feedback
> The coherence is ok. I attach the topography for coherence's peak. I took a
> head model not corresponding to the subject to test the algorithm quickly.
> This can be the matter. Anyway the single lead field should be influenced
> only by head model center, not by its radius, if i am not wrong. The radius
> defines only the grid i think. The particular case i consider has center (in
> head coordinates) [0.9 0 4.3] cm. Can these shifts from the nominal position
> [0 0 5] influence so much the result? Are there documents about it? About
> errors depending on the conductor position? I'm trying now to simulate it
> with surrogate data with corresponding gradiometers-head model relative
> position.
> I really would like to keep the topic active
>
> Sincerely
> Cristiano
>
>
> ----------------------------------
> The aim of this list is to facilitate the discussion 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/fcdonders/fieldtrip.
>
>
> ------------------------------------------------------------------------
>

--
Pádraig Kitterick
Graduate Student
Department of Psychology
University of York
Heslington
York YO10 5DD
UK

Tel: +44 (0) 1904 43 3170
Email: p.kitterick at psych.york.ac.uk

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The aim of this list is to facilitate the discussion 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/fcdonders/fieldtrip.