[Eeglablist] order of rythm isolation and ICA

[Makoto Miyakoshi]

Dear Vadlamani,

We recommend ICA first then frequency separation second.
>From electrophysiological point of view, what ICA does is equivalent to
finding an effective EEG sources and their activities. Before and after ICA
means before and after volume conductance + scalp mixing.

Makoto

On Wed, Nov 2, 2016 at 3:37 AM, Vadlamani Samhitha <
vadlamani.samhitha at gmail.com> wrote:

> Hi list . I have an urgent query . Can rythm isolation ( mu and beta ) be
> done on EEG.data before running ICA and the resulting activation matrix (
> obtained directly as a matrix in eeglab ) be used for feature extraction ?
> However , the following paper https://arxiv.org/ftp/
> arxiv/papers/1312/1312.2877.pdf has done it differently . It performed
> ICA first and then performed rythm isolation which changes only the
> EEG.data ( say EEG.data_new) and then asks to perform
> weights*sphere*(EEG.data_new-meandata) . Which one is correct ? Thank you
> .
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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