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<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: AdvTimes;">Dear all,<br></span></p><p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: AdvTimes;">as
it follows from J Onton’s paper: “…… jointly decomposing data from awake<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: AdvTimes;">and
sleeping conditions might not be optimal if the EEG source locations in these
portions of the data differed……” we do need to separate 2 conditions and than
perform <st1:place w:st="on"><st1:city w:st="on">ICA</st1:city></st1:place> on
each of them separately. <span style=""> </span><o:p></o:p></span></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: AdvTimes;">I
guess it should not be a problem cutting out some of the data (artifacts) from
EEG recording using EEGLAB function Reject an then running <st1:city w:st="on"><st1:place w:st="on">ICA</st1:place></st1:city> on this data, but then the question of
enough data arises. It was suggested in several publications to use k*n<sup>2 </sup>data
points (where k is a coefficient and n is a number of channels), to get a
stable results of the <st1:city w:st="on"><st1:place w:st="on">ICA</st1:place></st1:city>.
<span style=""> </span>It was suggested to use k of 20 by some (128
channel EEG) (McMenamin 2009) or even bigger. What experiences do you have? How
much data will one need to get stable <st1:place w:st="on"><st1:city w:st="on">ICA</st1:city></st1:place>
components in 128 channel recording?<o:p></o:p></span></p>
<p class="MsoNormal" style=""><span style="font-size: 10pt; font-family: AdvTimes;">And
thanks a lot for the previous answers, you help a lot. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 10pt; font-family: AdvTimes;"><o:p> </o:p></span></p>
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