[Eeglablist] Strange artifacts in the data

[Cedric Cannard]

Hello Ewa,

It is not possible to make attachments to the eeglablist, can you share a link to the image (via google drive, dropbox, figshare, etc.)?

Have you tried contacting BrainProduts? Generally, the manufacturers of the equipment are best to address this type of question as a first step.

Cedric Cannard



------- Original Message -------
On Friday, June 3rd, 2022 at 1:54 AM, Ewa Wiwatowska <ewiwatowska at swps.edu.pl> wrote:


> Hello everyone,
>
> In our laboratory, we are using the BrainVision Recorder and BrainAmpDC
> amplifier (Brain Products GmbH, Gilching, Germany) with 64 electrodes to
> record EEG data. We are concerned with strange artifacts that sometimes
> appear in the signal. It seems that there is no way to predict their
> appearance: in some cases there are so many of them that the file needs to
> be excluded from the analyses, sometimes just a small portion of signal is
> affected, and sometimes they are not present in the data at all. It seems
> that it is not linked to the impedance level nor to muscle artifacts, as
> often they appear in really clean data. I'm attaching the picture in the
> message: this signal is filtered with 0.1 Hz high pass and 30 Hz low pass
> filters.
>
> If any of you has come across something similar in the past or has any idea
> what might be the source of the problem, I would be really grateful for
> your help!
>
> Best,
> Ewa Wiwatowska
>
>
> --
>
>
> Ewa Wiwatowska
> Poznań Laboratory of Affective Neuroscience
> tel. +48 517 247 023
> e-mail: ewiwatowska at swps.edu.pl
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