[Eeglablist] ICA component rejection

[seetaramaraju jampana]

Hi Makoto,

    Thank you for the reply.
    Can you send me some good figures of frequency power spectrum of the
IC.Also can you share the independent components of a good EEG data.

Thanks,
'Raju



On Fri, Jul 24, 2015 at 11:46 AM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
wrote:

> Dear Raju,
>
> Sorry to tell you this but the 21 ICs are all noise.
>
> I strongly recommend you perform preprocess again. Read this page and
> check the steps. You may want to consider using PREP pipeline by Nima
> Bigdely-Shamlo (described in the wiki).
> http://sccn.ucsd.edu/wiki/Makoto's_preprocessing_pipeline
>
> Good ICs are determined by
> 1. Dipolarity of the IC scalp maps (see Delorme et al. 2012 PLoS One)
> 2. Frequency power spectrum of the ICs
> 3. ERP or ERSP (if available)
> Note this kind of evaluation (or interpretaion) is dependent on the
> experimental paradigms.
>
> Also, remember 'Garbage in, Garbege out'; if the experimental design is
> screwed up, you don't get EEG even if you use the fanciest preprocessing
> methods.
>
> Makoto
>
> On Fri, Jul 24, 2015 at 6:38 AM, seetaramaraju jampana <
> seetaramaraju.jampana at gmail.com> wrote:
>
>> Hi ,
>>
>>     How to reject ICA components by map. I mean to say , when the
>> components maps are generated what are the areas to look out which suggest
>> that the particular components has to be rejected.
>>    For Eg. the component map has been generated so which components are
>> fit for rejection.The compononents maps link is
>>
>>         https://www.dropbox.com/s/ixwz55hnv3a0pen/EEG_components.bmp?dl=0
>> <https://www.dropbox.com/s/ixwz55hnv3a0pen/EEG_components.bmp?dl=0>
>>
>> Thanks,
>> Raju
>>
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>
>
>
> --
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
>
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