Igor - Yes, bipolar channel data are still linearly related to source
activities, and are therefore suitable for decomposition by ICA, even
along with common reference channels. Visualizing the ICA
component maps, though, is not possible, stricly speaking, since the
bipolar channels are 'floating' from the other channels. <br>
<br>
One interesting possibility would be to add a common offset to each
pair of bipolar channels that maximizes the resulting smoothness of the
common-reference + bipolar component scalp map.... though I have not
tried this.<br>
<br>
Scott Makeig<br><br><div><span class="gmail_quote">On 6/21/06, <b class="gmail_sendername">Igor Riecansky</b> <<a href="mailto:igor.riecansky@savba.sk">igor.riecansky@savba.sk</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Dear Arno et al.,<br><br>I have a question concerning bipolar EOG recording. I read your advice in<br>the tutorial to use common-reference recording for all channels including<br>EOG. However, separate bipolar recording of EOG (with separately set
<br>parameters) enables, I assume, to enhance the sensitivity to ocular<br>artifacts. Is it possible/valid to include such bipolar channel(s) into a<br>multichannel EEG recording and submit the whole data to ICA in order to
<br>separate and remove the ocular artifacts?<br><br>Thank you for advice,<br><br>Igor<br><br><br><br><br>_______________________________________________<br>eeglablist mailing list <a href="mailto:eeglablist@sccn.ucsd.edu">
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