[Eeglablist] ERP based on mulitple triggers

[Makoto Miyakoshi]

Dear Xianghong,

> how to use the EKG and eye movement channels to get rid of the artifacts
from eye movements and EKG?

By running ICA including these channels. These channels will 'tell' ICA
about the artifacts to decompose.

Makoto

On Thu, Oct 16, 2014 at 3:26 PM, Xianghong <xianghong at hmri.org> wrote:

> Dear Makoto:
>
> Thank you so much for the reply, they are very helpful.
> When we have channels for eye movements and EKG artifact, and we know
> there are artifacts from the comparisons with these two channels, how to
> get rid of the artifacts from the brain electrodes? I guess my question is:
> how to use the EKG and eye movement channels to get rid of the artifacts
> from eye movements and EKG?
> Thank you,
> Best,
>
> Xianghong
>
>
>
> ________________________________________
> From: Makoto Miyakoshi [mmiyakoshi at ucsd.edu]
> Sent: Thursday, October 16, 2014 2:35 PM
> To: Xianghong
> Cc: eeglablist at sccn.ucsd.edu
> Subject: Re: [Eeglablist] ERP based on mulitple triggers
>
> Dear Xianghong,
>
> > 1. when we have channels for eye movement and EKG artifact, how to get
> rid of them?
>
> You don't need to exclude them. If you do anyways, 'Edit'-'Select data'
> and specify the channels to remove.
>
> > 2. How to decide the component to get rid of after we did ICA?
>
> If you are going to process them with STUDY, you don't need to reject ICs
> manually.
>
> Our 'STUDY' uses the following criteria to select good ICs: a) equivalent
> current dipole residual variance < 15%, which means you have to fit dipoles
> after ICA; b) dipole position inside the brain.
>
> > Plus, I saw eeglab could also analyse MEG data. Do we need to download
> plugins for eeglab? Where?
>
> That I don't know. I've heard you need to have a sensor matrix also?
>
> Makoto
>
> On Wed, Oct 8, 2014 at 9:40 AM, Xianghong <xianghong at hmri.org<mailto:
> xianghong at hmri.org>> wrote:
> Hi,
>
> I have studied and used eeglab for a few months, and need some help with
> the basic question about preprocessing EEG data:
> 1. when we have channels for eye movement and EKG artifact, how to get rid
> of them?
> 2. How to decide the component to get rid of after we did ICA?
>
> Plus, I saw eeglab could also analyse MEG data. Do we need to download
> plugins for eeglab? Where?
>
> Thanks,
> Best,
>
> Xianghong
>
>
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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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