[Eeglablist] Huge alpha peaks in one person

[Makoto Miyakoshi]

Dear Eric,

> huge alpha peaks resulting in huge power values at baseline (like 15-17)
in the alpha band and this is only when the subjects have their eyes closed

Yes, Berger found it in 1929. One of the most established EEG findings ever.

Makoto

On Sat, Apr 4, 2015 at 2:14 PM, Eric HG <erichg2013 at gmail.com> wrote:

> Hi everybody,
>
> There has been one resting-state EEG from a healthy subject that we have
> analyzed that has huge alpha peaks resulting in huge power values at
> baseline (like 15-17) in the alpha band and this is only when the subjects
> have their eyes closed. Has anyone experienced something like this? Could
> it be due to the preprocessing steps (I've used Butterworth filter: H-pass:
> 1 Hz and L-pass: 100 Hz, epoched the data and then removed the epochs with
> a lot of artifacts)?
> The ICA can easily separate the alpha peak components.
>
> Or can it just be due to individual variability?
>
> 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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