[Eeglablist] How should I interpret this strange component?
distancejay at gmail.com
Tue May 22 19:14:49 PDT 2012
Thanks for your comment.I will check my original dataset soon.But could
you please explain to me how 1 Hz high pass filter could make such a
strange component? I'm really naive on this.
2012/5/23 Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
> Dear Yuan-Fang,
> That is probably because you used a 1Hz high-pass filter. Probably
> your original dataset has a very strong sub-1Hz activity. Please check
> that possibility.
> 2012/5/22 Yuan-fang Chou <distancejay at gmail.com>:
> > Dear list,
> > I filtered my 64 channels data at 1~30Hz,and epoched it before running
> > ICA.Then I got one of the last a few components in the link below.It
> > appears that this component oscillates steadily at about 1 Hz
> > looks rather strange. Could anyone tell me how to explain this
> > activity?
> > https://www.dropbox.com/s/mgadt1q7scn9vsf/component.PNG
> > --
> > Yuan-Fang Chao
> > School of Psychology
> > SouthWest University
> > Beibei,Chongqing,China
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> Makoto Miyakoshi
> JSPS Postdoctral Fellow for Research Abroad
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
School of Psychology
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