[Eeglablist] ICA - very dark activity

[Makoto Miyakoshi]

Dear Veerle,

That's some kind of baseline drift.
Try high-pass filter (try 1 Hz for low cutoff using EEGLAB, which is
equivalent to -6dB at 0.5 Hz) and run ICA again.

Note also that something like IC68 (i.e. 68th independent component) is
usually noise.

Makoto


2013/7/31 Veerle Ross <veerle.ross at uhasselt.be>

> Hi all
> While performing ICA on my data I came across 2 components that show very
> dark activity (the images are available via the links below). Does anyone
> know what this means? Problems with electrodes?
> Best regards
>
> http://wikisend.com/download/480014/ICA_activity.png
> http://wikisend.com/download/386940/ICA_activity2.png
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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