[Eeglablist] Number of channels needed

[Makoto Miyakoshi]

Dear Eric,

> Is it possible to use the following for a 7 channel EEG (around 200 secs):

>     ICA for cleaning?

Sure. You want to remove eye ICs (blink, eye movement, etc). Valid here!

>     Interpolation of channels?

No. Because I don't think it's helpful.

>     Rereference to average?

It's risky. If you are sure that you have all 7 channels AND they are all
good, then you may try it.

> And with the ICA it sometimes seems like it's also removing some of my
data. Do anyone have experience with this?

If you project ICs to reconstruct scalp channel EEG, there could be a minor
difference due to limitation of numeric accuracy. But it should not be that
noticeable. If anything, it may be related to very low number of channels,
but I can't think of the possibility off the top of my head.

Makoto

On Wed, Oct 28, 2015 at 10:19 AM, Eric HG <erichg2013 at gmail.com> wrote:

> Hi everybody,
>
> Is it possible to use the following for a 7 channel EEG (around 200 secs):
>      ICA for cleaning?
>      Interpolation of channels?
>      Rereference to average?
>
> When I'm performing these on my data (7 channels and a duration of 200
> sec) it seems like the data gets messed up. And with the ICA it sometimes
> seems like it's also removing some of my data. Do anyone have experience
> with this?
>
> Best,
>
> Eric
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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