[Eeglablist] Using ICA to remove skin potentials?

[Ronald Phlypo]

Dear Steve,

ICA methods may be fruitful for this when they are based on the 
autocorrelation functions. Typical ICA functions of that type are SOBI 
and TDSEP. ICA methods based on instantaneous statistics (kurtosis: 
fastICA, JADE and COM2 or logistic functions: Infomax) would be of 
little use in the context of slowly varying time courses or rhythmic 
activity.

Hope this helps,

Ronald

Le 23/02/2012 04:27, Stephen Politzer-Ahles a écrit :
> Hello,
>
> I was wondering if anyone knows about (or could point me to references 
> about) whether it's feasible and valid to use ICA to remove 
> low-frequency artifact like skin potentials. I have a set of 
> recordings that has lots of problems with these, and while I've found 
> that a 0.5 Hz high-pass filter can attenuate them somewhat, I'm also 
> aware that high-pass filtering can have some big consequences. In the 
> past I have used ICA to remove EOG artifact and I know of others who 
> have used it for things like alpha, heartbeat, and muscle-related 
> artifacts, so I'm curious about whether I can use it to remove skin 
> potentials and what kinds of distortions it might create. But before I 
> do that I wanted to see if others use it for that, or if it sounds crazy.
>
> Thank you,
> Steve Politzer-Ahles
>
> -- 
> Stephen Politzer-Ahles
> University of Kansas
> Linguistics Department
> http://www.linguistics.ku.edu/
>
>
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