[Eeglablist] Brain PSD thresholds by frequency band

Alberto Sainz albertosainzc at gmail.com
Thu Jan 26 05:03:36 PST 2017

Dear Makoto and EEGLAB list,

Yes, I mean uV^2/Hz. I get a lot of ICs that are very difficult to label so
I also take in account PSD. However I still dont know if there are any
thresholds which I could use as a reference to evaluate if the IC could be
EEG or not.


2017-01-25 0:45 GMT+01:00 Makoto Miyakoshi <mmiyakoshi at ucsd.edu>:

> Dear Alberto,
> After performing ICA, you evaluate each IC not only by their PSD but also
> their spatial location etc. If an IC shows unmistakable EEG characteristics
> in spatial and time domain, I would take it a brain EEG even if delta power
> is 0-20 (??? what is 0-20 anyway? uV^2/Hz?)
> Makoto
> On Wed, Jan 18, 2017 at 10:32 PM, Alberto Sainz <albertosainzc at gmail.com>
> wrote:
>> Hello,
>> I am struggling a bit with ICA rejection when measuring PSD. I am not
>> sure if i am prunning too much data when i look at some results. For
>> example, I saw references of delta power between 0-6 and others between
>> 0-20. I am not sure when high delta power (20?) is an artifact or brain
>> activity.
>> For alpha band right now i dont get power values larger than 1.
>> Do we have any reference for (EEG-measured) PSD thresholds by frequency
>> band? Also any for typical PSD artifacts like eye blinks?
>> I hope I explained it correctly.
>> Thanks
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> --
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
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