[Eeglablist] Remove components from data

Tarik S Bel-Bahar tarikbelbahar at gmail.com
Wed Dec 22 11:33:48 PST 2010


Hi Andre,

A few quick thoughts that might help.

1. First try to make sure you have removed all the components you believe to
be artifactual.
2. Then using the new file, save out as a text file and using only EEG as
output, which then should be importable into the application of your choice.
3. If you are examining your back projected single trial EEG data and cannot
see your eye movement corrections, it's possible that significant
artifactual ICs remain in the data.
4. You may want to consider ADJUST, FASTER, or Dien's PCA toolbox, which all
use EEGLAB to automatize removal of artifactual ICs.

Good luck!



On Wed, Dec 22, 2010 at 2:15 AM, André Schmidt <andre.schmidt at bli.uzh.ch>wrote:

> Dear all
>
>
>
> I will try to remove certain components from my EEG data after ICA to
> correct for eye movements. After detecting the eye  components by maps more
> or less distinctly , I removed those.
>
> Now I have following problems: Firstly, I cannot see this correction in the
> frontal electrodes, what means the eye movement is still there. And
> secondly, I will import this file into SPM to estimate effective
> connectivity, but SPM was not able to convert the file.
>
>
>
> In analyzer software, I have to back-transform after ica. Is this analogous
> in eeglab and when yes how is this tool called? Or what do you recommend me?
>
>
>
> Thanks in advance
>
>
>
> Kindly regards
>
> André Schmidt
>
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