<div dir="ltr">Dear Claudio,<div><br></div><div><div><div>> As far as i know by now, different reference electrodes do not affect the scalp distribution.</div><div><br></div><div>Oh it does change the scalp distribution. For ICA it does not.</div><div><br></div><div>> I asked me this question, because theoretically the summed activity of all electrodes equals zero only if you have a comprehensive electrode montage.</div><div><br></div><div>That's a good point. And the head should be a perfect sphere (with no neck) too :-)</div><div><br></div><div>> Thus, are 64 electrodes enough for using an online average reference? <br></div></div></div><div class="gmail_extra"><br></div><div class="gmail_extra">Practically no problem.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Makoto</div><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Mar 13, 2015 at 6:12 AM, Claudio Georgii <span dir="ltr"><<a href="mailto:Claudio.Georgii@stud.sbg.ac.at" target="_blank">Claudio.Georgii@stud.sbg.ac.at</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div><div><div>Hi,<br></div>i am Claudio Georgii, a Ph.D. student at the University of Salzburg, Austria. I am currently working with EEGlab to analyse my EEG data in the source space using the measure projection toolbox (MPT). <br><br></div>I try do evaluate know whether using an online average reference (64 electrode system) has an impact on the source distribution. As far as i know by now, different reference electrodes do not affect the scalp distribution. But have different electrode montages, while using an online average reference, an impact on the scalp distribution?<br><br></div><div>I asked me this question, because theoretically the summed activity of all electrodes equals zero only if you have a comprehensive electrode montage. Thus, are 64 electrodes enough for using an online average reference? <br><br></div><div>Best,<br></div><div>Claudio<br></div></div>
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