[Eeglablist] Eye Movement Artifact correction
Agnieszka Zuberer
azuberer at googlemail.com
Thu Jan 21 08:57:02 PST 2016
Dear eeglab-users,
we currently do measurements with 4 eye-, 2 mastoids- and 3 scalp
electrodes (FZ,CZ,OZ)
struggling with finding a suitable eye movement artifact correction
procedure.
- *ICA *can only create components equal to one less than the total
number of electrodes that one has recordings from, so this procedure
probably will not be suitable.
- We tried a *regression based correction* (gratton et al, 1985) but it
was over-correcting the artifact, sometimes even flipping polarities of
eye blinks amplitudes.
- one can remove some noise with a low-pass filter, but that won't get
rid of eye artifacts.
- High-pass filters can distort potentials generated by eye blinks, so
that it will become difficult to find them with *thresholding procedures*
.
Advice for a proper solution for this problem would be highly appreciated.
Would a kurtosis based artifact correction (as implemented in eeglab) be
suitable in our special case or does the eeglab-plugin for kurtosis based
artifact rejection depend on a certain number of electrodes?
Thank you in advance for your response.
Agnieszka Zuberer
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