[Eeglablist] ICA and eye blink component
marco.buiatti at gmail.com
Tue Aug 5 23:53:26 PDT 2014
blinks are usually well identified by ICA. You may not easily identify
1) your subject blinks really a few times -> not enough for being captured
by ICA, you may just discard the few epochs containing the blinks;
2) when your subject blinks, s/he moves so much that the relative artifact
spreads over most sensors, and ICA is not able to capture it in a few clear
components -> Also in this case my advice is to discard the epochs
containing the blinks;
3) you are computing the ICA on noisy data -> reject segments of your data
containing non-stereotypical artifacts and compute the ICA again.
ADJUST works well only if the ICA is computed on clean enough data.
On blinks: Croft, R., & Barry, R. (2000). Removal of ocular artifact from
the EEG: A review. Clinical Neurophysiology, 30, 5–19.
On removing blinks with ICA: Jung, T.-P., et al. (2000). Removing
electroencephalographic artifacts by blind source separation.
Psychophysiology, 37, 163–178.
On removing blinks with ADJUST: Mognon A, Bruzzone L, Jovicich J, Buiatti
M, ADJUST: An Automatic EEG artifact Detector based on the Joint Use of
Spatial and Temporal features. Psychophysiology 48 (2), 229-240 (2011).
Hope this helps,
On 5 August 2014 08:53, bjj2909102003 <bjj2909102003 at 163.com> wrote:
> 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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