[Eeglablist] ICA assumption (independence of sources)

[Makoto Miyakoshi]

Dear Ali,

> the brain sources are not independent in reality,

That may be true. In that case, ICA is extracting independent part of brain
activity.

However, at least in a standard psychological assumptions, when you are
performing visual task, your auditory cortex is not directly engaged,
therefore EEG from the visual cortex and the auditory cortex should be
independent. Don't you agree?

Makoto



On Tue, Jan 24, 2017 at 5:30 AM, ali zahedi <ali.zahedi.bham at gmail.com>
wrote:

> Hi all,
>
> I have a question about one of the assumptions of the ICA on estimated
> sources; "the sources estimated by ICA are statistically independent". If
> we want to apply ICA to EEG data, does this assumption make sense for brain
> sources? the brain sources are not independent in reality, so how does ICA
> work for EEG data?
>
> Thank you in advance,
> Ali
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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