[Mne_analysis] Eye artifact removal using ICA

[Alexandre Gramfort]

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hi Neelesh,

you look at ICA components and one looks like the EOG artifacts
just exclude it manually by setting ica.exclude attribute.

HTH
Alex


On Fri, Jul 27, 2018 at 10:25 PM Neelesh Kumar <neelesh314 at gmail.com> wrote:

>         External Email - Use Caution
>
> Hi all,
>
> I am trying to remove all eye artifacts from an EEG recording with an EOG
> channel using ICA (following the tutorial on MNE). I applied a bandpass
> filter (1 and 40Hz) to the signal and removed the default average
> reference. Then I fit ICA as follows:
>
> picks = mne.pick_types(raw.info, eeg= True, eog= True, stim= False,
> exclude= 'bads')
> ica= ICA(n_components=25, method='fastica', random_state=1)
> ica.fit(raw, picks=picks, decim=3)
>
> n_max_eog=2
> eog_epochs=create_eog_epochs(raw, ch_name='EXG1')
> eog_inds, scores= ica.find_bads_eog(eog_epochs)
>
> As an output, this says only 2 EOG events detected (when there are many
> more blinks). I can add the reject criteria with reject=dict(eog=threshold)
> but I do not know what threshold to choose. I am relatively new to MNE.
>
> I am attaching the link to the file, if it helps.
>  Giannis_72518_Active.bdf
> <https://drive.google.com/file/d/1Jyh_BBPGrnghIcNo1bDYD4yxevu_B4UI/view?usp=drive_web>
> Thanks for all your help! Really appreciate it.
>
> -Neelesh
>
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