[Eeglablist] Fw: Preprocessing Questions

[Mahjabeen Rahman]

I am also getting some wobble message  after opt. center (see below). Is it something to be concerned about ?

"Optimizing center position...
Wobble too strong ( 12%)! Re-centering data on (1.19058,-16.0254,2.35827)
Wobble (5.7%) after centering data on (1.19058,-16.0254,2.35827)
Note: automatically convert XYZ coordinates to spherical and polar"

Thanks in advance,
Mahjabeen
________________________________
From: eeglablist <eeglablist-bounces at sccn.ucsd.edu> on behalf of Clement Lee <cll008 at eng.ucsd.edu>
Sent: Monday, March 23, 2020 1:55 PM
To: Hadji, Mohammad <mohammad.hadji at wustl.edu>
Cc: eeglablist at sccn.ucsd.edu <eeglablist at sccn.ucsd.edu>
Subject: Re: [Eeglablist] Fw: Preprocessing Questions

Hi Mohammad,

Unfortunately with EEG there is no standard way of preprocessing and
processing. You're right that literature and pipelines and guides often
contradict each other. My suggestion is to pick the methods that best
applies to you and your dataset (if you know), or replicate the procedures
in a comparable study.

When are you getting this wobble? Is it when you optimize the head center
of the channel locations?

Best,
Clement Lee
Applications Programmer
Swartz Center for Computational Neuroscience
Institute for Neural Computation, UC San Diego
858-822-7535


On Mon, Mar 23, 2020 at 7:55 AM Hadji, Mohammad <mohammad.hadji at wustl.edu>
wrote:

>
>
> ________________________________
> From: Hadji, Mohammad
> Sent: Saturday, March 21, 2020 9:56 PM
> To: eeglablist at sccn.ucsd.edu <eeglablist at sccn.ucsd.edu>
> Subject: Preprocessing Questions
>
> Hello EEGLAB Members,
>
> I have been reading the following preprocessing pipeline:
> https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsccn.ucsd.edu%2Fwiki%2FMakoto%27s_preprocessing_pipeline%23Epoch_data_to_-1_to_2_sec_.2809.2F11.2F2019_updated.29&data=02%7C01%7Cmahjabeen.rahman%40knights.ucf.edu%7Ce8606ca1e5ab4818087408d7cf539c83%7C5b16e18278b3412c919668342689eeb7%7C0%7C0%7C637205830328069364&sdata=dDWolCCMlIjohWv35SrYkHtmmTg015PnSVZe0BptRL8%3D&reserved=0
> and I have a few questions:
>
> I am looking to re-reference my data (19 electrodes) using REST (Provided
> as a plugin for EEGLAB) and remove and interpolate electrodes using
> clean_rawdata, then apply ICA. I have PZ currently set as the reference. In
> what order should I remove, interpolate, and re-reference my EEG data
> before sending things to ICA in order to best clean my data without having
> any rank issues? It seems like the literature really conflicts and several
> pipelines for preprocessing EEG have been suggested. HAPPE re-references
> after ICA for example and Makoto's pipeline says to do the opposite.
>
> I also am getting some Wobble with obtaining locs with EEGLAB, is this
> something to be concerned about?
>
>
> Thank you,
>
>
> Mohammad
>
>
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