[Eeglablist] ASR Removes my EOG channels

[Makoto Miyakoshi]

Dear Hamed,

> For the first time, I disable the third box in ASR ( Remove poorly
correlated channels), so the ASR cleans the data without channels rejection

In this way, ASR may need to clean/reject more portion of data because you
are including channels that are supposed to be rejected.

If you add back the channel rejected after ASR, though, you may introduce
noise in that channel that is supposed to be reduced by ASR. So both
approaches seem to have problems, but probably the latter case is better
than the former; once you reject data, they are lost forever.

You can empirically check which is better rather than 'thinking' which is
better.

Makoto

On Mon, May 14, 2018 at 1:20 PM Hamed Taherigorji <
hamed.taherigorji at uniroma1.it> wrote:

> Dear Mokoto,
>
> Thanks a lot for your reply.
> I'm using another method and want to know your idea.
> For the first time, I disable the third box in ASR ( Remove poorly
> correlated channels), so the ASR cleans the data without channels rejection
> and then with select data option in EEGLAB I remove the EOGs then again use
> the ASR and this time set the third box on 0.8 to remove the bad channels.
> Finally, I use a script to add again EOGs from the previous dataset.
> Is it ok?
>
> Hamed
>
>
> On 14 May 2018 at 21:29, Makoto Miyakoshi <mmiyakoshi at ucsd.edu> wrote:
>
>> Dear Hamed,
>>
>> After applying clean_rawdata(), it generates clean_channel_mask under
>> EEG.etc. You apply clean_rawdata() once, obtain the clean_channel_mask,
>> modify it so that the mask does not indicate EOG channels to reject. Using
>> this custom channel mask, perform EEGLAB pop_select() to reject channels,
>> then feed this data to clean_rawdata() again without performing channel
>> rejection.
>>
>> Makoto
>>
>>
>> On Thu, May 10, 2018 at 1:55 AM Hamed Taherigorji <
>> hamed.taherigorji at uniroma1.it> wrote:
>>
>>> Hello Dear Mokoto,
>>>
>>> I hope everything is going well with you.
>>> I've read your preprocessing pipeline and it very interesting.
>>> I've tried to use ASR but unfortunately, it removes my EOG channels.
>>> Could you please let me know how can I solve this problem? because I
>>> need my EOG channels for ICA step.
>>>
>>> Best Regards,
>>> Hamed
>>>
>>> --
>>> Hamed Taheri Gorji
>>> PhD Candidate
>>> Brain Imaging Laboratory
>>>
>>> DEPARTMENT OF PSYCHOLOGY
>>> FACULTY OF MEDICINE AND PSYCHOLOGY
>>> SAPIENZA
>>> University of Rome
>>>
>>> Santa Lucia Foundation, Via
>>> Ardeatina 306, 00179 Rome
>>> <https://maps.google.com/?q=Ardeatina+306,+00179+Rome&entry=gmail&source=g>
>>>
>>>
>>> ___________________________________________
>>> *Il tuo 5 diventa 1000*
>>> Fai crescere la tua università
>>> Dona il 5 per mille alla Sapienza
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>>> https://www.uniroma1.it/it/pagina/fai-crescere-la-tua-universita-con-il-cinque-mille
>>>
>>>
>>
>> --
>> Makoto Miyakoshi
>> Swartz Center for Computational Neuroscience
>> Institute for Neural Computation, University of California San Diego
>>
>
>
>
> --
> Hamed Taheri Gorji
> PhD Candidate
> Brain Imaging Laboratory
>
> DEPARTMENT OF PSYCHOLOGY
> FACULTY OF MEDICINE AND PSYCHOLOGY
> SAPIENZA
> University of Rome
>
> Santa Lucia Foundation, Via
> Ardeatina 306, 00179 Rome
>
>
> ___________________________________________
> *Il tuo 5 diventa 1000*
> Fai crescere la tua università
> Dona il 5 per mille alla Sapienza
> Codice fiscale: *80209930587*
>
> https://www.uniroma1.it/it/pagina/fai-crescere-la-tua-universita-con-il-cinque-mille
>
>

-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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