<div dir="ltr">Dear Ida,<div><br></div><div style>1. Put event markers for breathing onset/peak/offset and try event-related potential analysis. Regression analysis seems to work too, but the current EEGLAB does not support it.</div>
<div style><br></div><div style>2. Reference and ground are not for data recording. Well, reference channel is paired with ALL channels, actually. After average referencing you can recover at least reference channel signal, but that introduces redundancy (because the recovered channel is a pure linear combination of the surrounding channels). Note also that after average referencing you have to discard one channel.</div>
<div class="gmail_extra"><br></div><div class="gmail_extra">It's better for you to google what reference and ground channels do. You don't know it means you don't know how EEG is recorded, which is no good.</div>
<div class="gmail_extra"><br></div><div class="gmail_extra">Makoto<br><br><div class="gmail_quote">2013/6/17 ida miokovic <span dir="ltr"><<a href="mailto:ida.miokovic@gmail.com" target="_blank">ida.miokovic@gmail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><span style="font-family:arial,sans-serif;font-size:13px">Dear list,</span><div style="font-family:arial,sans-serif;font-size:13px">
<br></div><div style="font-family:arial,sans-serif;font-size:13px">I have 2 questions which I will try to present as clear as I can and to thank you in advance for any help:</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">1. I am trying to find relation (causal connection) between EEG dataset and certain breathing signal (let's say it is B signal) recorded at the same time as EEG.</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px"> I performed EEG data preprocessing (filtering, ICA and removal of components recognized as artifacts).</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px"> So on one side I have continuous signal of EEG channels and on the other side continuous signal B (of the same size as EEG channels recording). What are the best ways to perform this in EEGLAB? I suppose everyone is always trying to find certain relation between something and EEG signals so I suppose it is not unusual request. </div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">2. This question is about re-referencing to the average reference - EEG dataset I am working with has been recorded with AFz as GND and FCz as REF (128 chennels Acti Cap is used). Nothing from these channels isn't present in data I have (I did not participate in recording procedure) and I would like to re-reference data to the average reference. Is it usual that activity from REF and GND channels are not given/measured? In tutorial of EEGLAB, I found suggestion to include reference channels in the average reference if they are on the scalp. Mine are on the scalp, but I don't have any recordings of them. Also, everyone is mentioning REF electrode, and I have GND too...</div>
<div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">Kind regards and thank you for your time and help</div><span class="HOEnZb"><font color="#888888"><div style="font-family:arial,sans-serif;font-size:13px">
<br></div><div style="font-family:arial,sans-serif;font-size:13px">Ida</div><div style="font-family:arial,sans-serif;font-size:13px"><br></div></font></span></div>
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-- <br><div dir="ltr">Makoto Miyakoshi<br>Swartz Center for Computational Neuroscience<br>Institute for Neural Computation, University of California San Diego<br></div>
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