[FieldTrip] Spike artifacts in EEG, 7-12Hz

[Marcin Koculak]

Dear Matthias,
I have never seen such artifacts, but if you are working with patients with
Parkinson's, have you checked if they have deep brain stimulation devices?
Maybe that is causing the artifacts in the data?
best,
Marcin

śr., 28 lis 2018 o 16:11 Blume Christine <christine.blume at sbg.ac.at>
napisał(a):

> Dear Matthias,
>
>
>
> Admittedly, I do not know what this could be. While the first step should
> of course be to find the source and eliminate this (any devices in the EEG
> lab, artefact from the acoustic stimulation/headphones, …), in case you are
> unable to find it, you could remove the component(s) that correspond to the
> artefact. But as I said, the first goal should always be to record clean
> data…
>
>
>
> Best,
>
> Christine
>
>
>
>
>
> *Von:* fieldtrip <fieldtrip-bounces at science.ru.nl> *Im Auftrag von *"Matthias
> Möller"
> *Gesendet:* Mittwoch, 28. November 2018 15:16
> *An:* fieldtrip at science.ru.nl
> *Betreff:* [FieldTrip] Spike artifacts in EEG, 7-12Hz
>
>
>
> Dear all,
>
>
>
> my name is Matthias and I am relatively new to the field of EEG analysis.
> I'm currently carrying out a study on the effects of natural sounds on the
> quantitative EEG in patients with Parkinson's disease at the universities
> of Vanvouver and Marburg.
>
>
>
> Right now I'm experiencing these weird artifacts as seen in the
> screenshot. It's sharp spikes, looking similar to ECG artifacts, but in
> frequencies of 7-12Hz.
>
> They are also showing up in the independent components after ICA as well.
>
>
>
> The recording was done at a sampling rate of 500 Hz, I've applied a
> Band-Pass filter from 1-249Hz and two notch filters, 60 and 120 Hz
> (recording took place in Canada).
>
>
>
> Has anyone seem similar artifacts before and maybe even knows how to get
> rid of them?
>
>
>
> Many thanks in advance and all the best,
>
>
>
> Matthias
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> https://doi.org/10.1371/journal.pcbi.1002202
>
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