[Eeglablist] ERSP and ERP analyse using MPT clustering method

[Makoto Miyakoshi]

Dear Mohammed,

> Is this mean that even though I do not select the same ICs, I can still
compare spatial distributions of ERSP and ERP clusters?

My point is that you should not handpick the ICs before running clustering
or Measure Projection. Just apply an appropriate IC cleaning (using the
method I suggested for example) and let clustering or Measure Projection to
choose and cluster the ICs.

If you do not select the same ICs, you cannot compare spatial distributions
between ERSP and ERP domains in MPT.

I hope I made myself clear... sorry if my explanation is not
straightforward.

Makoto

On Sat, May 16, 2015 at 3:27 AM, Mohammed Jarjees <
m.jarjees.1 at research.gla.ac.uk> wrote:

> Dear Makoto,
>
> Thank you very much for your answer.
> Is this mean that even though I do not select the same ICs, I can still
> compare spatial distributions of ERSP and ERP clusters?
>
> Best Regards
>
> Mohammed Jarjees
>
> PhD Student
> Centre for Rehabilitation Engineering
> Biomedical Engineering Department
> University of Glasgow
> Mobile +44 (0)757 677 2323
>
> ________________________________________
> From: Makoto Miyakoshi [mmiyakoshi at ucsd.edu]
> Sent: 15 May 2015 13:40
> To: Mohammed Jarjees
> Cc: eeglablist at sccn.ucsd.edu
> Subject: Re: [Eeglablist] ERSP and ERP analyse using MPT clustering method
>
> Dear Mohammed,
>
> > 1. Should I select the same ICAs for ERP and ERSP?
> Follow this instruction and clean your ICs using STUDY
> http://sccn.ucsd.edu/wiki/Backproject_clustered_ICs
> And you can use ERP or ERSP as you want in MPT. I mean you want to use the
> same set of ICs from this cleaning for anything.
>
> Makoto
>
> On Mon, May 11, 2015 at 2:46 AM, Mohammed Jarjees <
> m.jarjees.1 at research.gla.ac.uk<mailto:m.jarjees.1 at research.gla.ac.uk>>
> wrote:
> Dears,
>
> I want to cluster my 61 electrodes EEG data for three groups of people
> each group has 10 subjects and each subjects has three conditions.
> I would like to analyse ERSP and ERP and to use MPT clustering method. MPT
> suggest to use one feature at the time, so I will create separate studies
> for ERSP and ERP. I would like to be able to compare clustering of ERSP and
> of ERP as these two variables might not necessarily have the same clusters.
>
>
> My questions are:
> 1. Should I select the same ICAs for ERP and ERSP?  Though this might
> sound a common sense, by visual inspection of ICAs I've noticed that some
> ICs have very strong ERP while not much is going on in ERSP and vice-versa,
> some have very little ERP with strong ERSP. Therefore taking common
> components for both might blur  results for both ERP and ERSP.
> 2. In case I should not use the same components, may I produce two ICs
> sets, one filtered at 0.1Hz for ERP and the other filtered with 1Hz for
> ERSP. That is because filtering with 1Hz for ERSP really helps removing a
> baseline drift and I get clearer ICs then when filtering with 0.1 Hz (which
> is necessary should I analyse ERP)?
> Would I still be able to compare spatial locations of ERP and ERSP
> clusters?
>
> Thank you very much for your help.
> Best regards,
> Mohammed
>
>
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>
> --
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
>



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