[Eeglablist] ICA and eye blink component
marco.buiatti at gmail.com
Wed Aug 6 23:25:43 PDT 2014
As I said before, ADJUST is not magic and there are several factors that
may contribute to missing blink artifacts.
Could you please let me know more about your data (number of electrodes,
number of trials, time interval) and send me a screenshot of ADJUST results
(the ICA components classified or not as artifactual)?
On 6 August 2014 03:59, bjj2909102003 <bjj2909102003 at 163.com> wrote:
> Thank you for replying.
> Actually, the problem is ADJUST. I find ADJUST sometimes doesn't detect
> eye blink. So I must take a look into blink component just to be sure.
> Another problem is that only once ICA is enough for reject eye blink and
> other artifact by ADJUST? In ADJUST manual, it said ADJUST is not suitable
> for rerun(second) ICA.
> I tried to rerun ICA simply. But the result seemed not better than the
> first ICA result. And the strange thing was that after the first ICA the
> signals were more smooth than ones after the second ICA(looked like higher
> sampling frequency , but the dataset size didn't change)?
> Thank you!
> *From:* Stephen Politzer-Ahles <spa268 at nyu.edu>
> *Date:* 2014-08-06 05:07
> *To:* bjj2909102003 <bjj2909102003 at 163.com>
> *CC:* eeglablist <eeglablist at sccn.ucsd.edu>
> *Subject:* Re: [Eeglablist] ICA and eye blink component
> It does not; some participants won't show as clear a component (maybe they
> had fewer blinks or their blinks were less stereotypical). Sometimes it can
> help to record a few blinks on purpose at the beginning of the recording to
> use as a template.
> Stephen Politzer-Ahles
> New York University, Abu Dhabi
> Neuroscience of Language Lab
> On Tue, Aug 5, 2014 at 2:53 PM, bjj2909102003 <bjj2909102003 at 163.com>
>> I want to use ICA to reject eye blink. But for some subjects it is easy
>> to find eye blink component, for others it is hard to find blink component
>> even I use the plugin-ADJUST. So does ICA extract eye blink component
>> without fail??
>> Thanks so much!
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Marco Buiatti, PhD
CEA/DSV/I2BM / NeuroSpin
INSERM U992 - Cognitive Neuroimaging Unit
Bât 145 - Point Courrier 156
Gif sur Yvette F-91191 FRANCE
E-mail: marco.buiatti at gmail.com
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