[Eeglablist] source signals

[Tarik S Bel-Bahar]

Hello Nasrin,

Sloreta does compute source signals as a time series if you want, review
the documentation and GUI for Loreta.

In eeglab, the dipoles for ICs are essentially just "spatial" information
that specify dipole estimates for a particular IC (or cluster of ICs in
STUDY).

>From eeglab's perspective, the ICs are themselves neural sources that have
been decomposed by ICA.
Thus once you have an ICA decomposition in eeglab, you can consider the IC
values (over time) in the eeglab .set files as
"continuous source signals". Of course, there's a lot of theory and opinion
to this point of view, but it's pretty accurate.

If you seek distributed source signals, you're likely better off with
sloreta, brainstorm, mne python, and some other tools out there.

You may also be interested in exploring Zeynep's NFT toolbox for eeglab,
which may have some options of interest to you.

If you have more questions about how ICA reflects sources, I recommend, if
you have not had a chance to yet, to review the following:
ICA tutorial and tutorial data on the eeglab website
Onton and Makeig's chapter on ICA



You may also appreciate the following article:
Brain-Source Imaging: From sparse to tensor models
<https://scholar.google.com/citations?view_op=view_citation&hl=en&user=ysFFLvkAAAAJ&cstart=20&sortby=pubdate&citation_for_view=ysFFLvkAAAAJ:ClCfbGk0d_YC>
H Becker, L Albera, P Comon, R Gribonval, F Wendling, I Merlet
IEEE Signal Processing Magazine 32 (6), 100-112






On Sun, Nov 13, 2016 at 8:34 AM, nasrin maarefi <n_maarefi at yahoo.com> wrote:

> Hello
> I want to do source localization for constructing my signals sources from
> my ERPs. I did it by sLoreta software but I couldn't get source signals
> values like time series.
> Is there any way in EEGLAB to construct source signals with matrix output
> not just color figures of activity?
> thanks in advance.
>
>
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