[Eeglablist] eeglablist-before ICA decomposition

Tarik S Bel-Bahar tarikbelbahar at gmail.com
Mon Nov 13 11:36:39 PST 2017


Hello Mehmet,

If you haven't had a chance to please review the basic eeglab tutorial
steps and do them with eeglab tutorial data.
The eeglab tutorial provides all basic recommendentations for users new to
eeglab and ica, it is very beneficial.
See also Makoto's pipeline for a list of useful suggestions for beginners.
google it if you haven't read through it.

To start with, I recommend sticking with the first basic recommendations on
eeglab tutorial.
If you do things differently, you can review the differences (if any)
between doing it one way or another.

Changing to zero mean should not create a problem for ICA, but I am not
100% sure.

Regarding filtering, it's okay if you use a, for example, 1-50 Hz filter
instead of just a high-pass filter.




On Sat, Nov 11, 2017 at 12:23 AM, m. kazanç <mekazanc at hotmail.com> wrote:

> Hello,
>
> I have a few quesiton related to EEG Pre-processing,
>
> We had 19 + 7 (EOG) channels recording,
>
> I will firstly make artifact removal,
>
> Before do that, I firstly made all channels zero mean for each recording
> (each recordin round, 16 channels will have zero mean),
>
> After that I filtered between 1-70 Hz,
>
> Then, ICA decomposition was performed to select artifactual components,
>
> I searched on eeglablist to find filtering and mean averaging process, but
> I could not find steps like me,
>
> They suggested to use high pass filtering (>1 Hz)..
>
> My question is ,
>
> 1- mean averaging as a first step is convenient ?
>
> 2- using bandpass filtering instead of High pass filtering , leads a
> problem ?
>
> I am looking forward your answer,
>
> thank you
>
> --mehmet
>
>
>
>
>
>
>
>
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