[Eeglablist] Issue with 50 Hz

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Wed Dec 16 11:33:22 PST 2015

Dear Jason,

CleanLine does not guarantee to remove the line noise completely,
especially if the level is very high--I don't know why it behaves like
this, but on this point CleanLine is different from notch filter (notch
filter never fail to dig a hole in the spectrum curve). If you find out
that it unfortunately did not work well, you should either apply notch
filter or give up above the line frequency. I updated my pipeline wiki.


On Mon, Dec 14, 2015 at 11:06 PM, jason roger <jasonroger8 at gmail.com> wrote:

> Hi everyone,
> I processed my EEG data using Makoto's preprocessing steps. Now, my
> datasets are ready for the analysis stage. The I  issue I have is only
> occurred with *one* of the participants where beta power has the highest
> value at 50 Hz in data.
> Is there any problem with this? I'm asking because I observed that some
> resources are considering that 50 Hz is a sign of the line noise in the
> electrode. I'm getting confused about this because I already performed the
> step of cleanLine in Makoto's preprocessing steps.
> Any advice will be highly appreciated.
> Thanks.
> Jason
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Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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