[Eeglablist] Bilateral dipoles

[Makoto Miyakoshi]

Dear Salim,

Well, I'm concerned with the two dipole fit results. They don't seem
symmetrical. How did you obtain the current positions?

Makoto

On Thu, Mar 5, 2015 at 1:28 AM, Salim Al-wasity <salim_alwasity at yahoo.com>
wrote:

> Dear Mr. Makoto
> Thanks for your reply. I attached a picture of bilateral dipoles obtained
> by (Locate Dipoles using DIPFIT2> Plot component dipoles) and it shows only
> only coordinate. However (Locate Dipoles using DIPFIT2> Fine fit) shows two
> coordinates. Which coordinates are the correct one?
>
> Sincerely
> Salim
>
> dipoles.JPG
> <https://drive.google.com/file/d/0B-waDFAaEHcudzlhTzJEU21xUUk/view?usp=sharing>
>
>
> [image: image]
> <https://drive.google.com/file/d/0B-waDFAaEHcudzlhTzJEU21xUUk/view?usp=sharing>
>
>
>
>
>
> dipoles.JPG
> <https://drive.google.com/file/d/0B-waDFAaEHcudzlhTzJEU21xUUk/view?usp=sharing>
> View on drive.google.com
> <https://drive.google.com/file/d/0B-waDFAaEHcudzlhTzJEU21xUUk/view?usp=sharing>
> Preview by Yahoo
>
>
> fine fit.JPG
> <https://drive.google.com/file/d/0B-waDFAaEHcuRGdyNm9IUFg5azA/view?usp=sharing>
>
>
> [image: image]
> <https://drive.google.com/file/d/0B-waDFAaEHcuRGdyNm9IUFg5azA/view?usp=sharing>
>
>
>
>
>
> fine fit.JPG
> <https://drive.google.com/file/d/0B-waDFAaEHcuRGdyNm9IUFg5azA/view?usp=sharing>
> View on drive.google.com
> <https://drive.google.com/file/d/0B-waDFAaEHcuRGdyNm9IUFg5azA/view?usp=sharing>
> Preview by Yahoo
>
>
>
>
>   On Wednesday, 4 March 2015, 15:50, Salim Al-wasity <
> salim_alwasity at yahoo.com> wrote:
>
>
> Dear Mr. Makoto
> Thanks for your reply. I attached a picture of bilateral dipoles obtained
> by (Locate Dipoles using DIPFIT2> Plot component dipoles) and it shows only
> only coordinate. However (Locate Dipoles using DIPFIT2> Fine fit) shows two
> coordinates. Which coordinates are the correct one?
>
> Sincerely
> Salim
>
>
>   On Tuesday, 3 March 2015, 2:03, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
> wrote:
>
>
> Dear Salim and Arno (cc Caterina)
>
> Sorry for the slow response.
>
> > Therefore I used bilateral dipoles to reduce the RV.
>
> Use bilateral dipole only when you see clear bilateral scalp topography!
>
> > 1- In (plot component dipoles) options, it gives me only one
> coordination ever if I have two dipoles. How can I know where these two
> dipoles are?
>
> Really? That sounds weird to me. You should close the fine fit window by
> pressing 'ok' and not 'x' to update the data.
>
> >2- Using a PCA clustering approach, I might find one cluster located at
> the right hemisphere but it has some dipoles at the left side (bilateral
> dipoles), Is this cluster correct?
>
> Yes, that should be correct. To be honest I don't know how STUDY
> clustering handles dual dipoles, and I (and Caterina also) have wanted to
> know about it. Arno?
>
> Makoto
>
> On Tue, Feb 24, 2015 at 7:08 AM, Salim Al-wasity <salim_alwasity at yahoo.com
> > wrote:
>
> Dears
> After decompose my EEG data to components using ICA and estimate their
> dipoles, some of these dipoles have high residual variance(RV). Therefore I
> used bilateral dipoles to reduce the RV.
> 1- In (plot component dipoles) options, it gives me only one coordination
> ever if I have two dipoles. How can I know where these two dipoles are?
> 2- Using a PCA clustering approach, I might find one cluster located at
> the right hemisphere but it has some dipoles at the left side (bilateral
> dipoles), Is this cluster correct?
>
> Sincerely
> Salim
>
>
>
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>
>
> --
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
>
>
>
>
>


-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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