<div dir="ltr">Dear Clemens,<div><br></div><div>If you run ICA it'll evaluate the spatial distribution of the frontal theta across ALL channels, so it does not matter if you miss FCz for example.</div><div><br></div><div>Otherwise--reference and ground channels are the two most important channels which you CANNOT reject. Therefore you want to place them to the most mechanically stable location, such as earlobe using a clip. If you set the reference to Cz for example and the electrode cap was a bit too big or does not fit the subject's head shape, your Cz may be loose--this will be a disaster.</div><div><br></div><div>I recommend you use average reference even if you don't use ICA, so the initial reference location is relatively trivial (other than the contact stability issue).</div><div><br></div><div>Both nose tip and earlobes sound good, but I would personally avoid nose tip since it bothers subjects.</div><div><br></div><div>Makoto</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Mon, Dec 14, 2015 at 6:40 AM, Clemens DICKHUT <span dir="ltr"><<a href="mailto:clemens.dickhut@uni.lu" target="_blank">clemens.dickhut@uni.lu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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Dear EEG experts,
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<div>I am using the standard ActiCap (layout attached) and I would like to replace the ground (AFz) and reference (FCz) electrodes with two others, as these occupy the frontal-medial region which will be a region of interest in my analyses (frontal-midline
theta oscillations during working memory). </div>
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<div>Which electrodes do you think could I sacrifice from the head to use as FCz and AFz, or in other words, which other sites would be appropriate for ground and reference? </div>
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<div>I was thinking about the nose as reference and leaving the ground where it is, or, using POz and Oz as Ref and ground, respectively. </div>
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<div>What do you suggest? Thanks in advance for your input! </div>
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<div>Kind regards, </div>
<div>Clemens </div>
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Clemens Dickhut, M.Sc., (PhD Student) <br>
Institute for Health and Behaviour<br>
Research Unit INSIDE<br>
University of Luxembourg - Campus Belval<br>
Maison des Sciences Humaines<br>
11, Porte des Sciences, R. 04 415<br>
L-4366 Esch-sur-Alzette</div>
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Tel.: <a href="tel:%28%2B352%29%2046%2066%2044%209536" value="+3524666449536" target="_blank">(+352) 46 66 44 9536</a><br>
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<div>Begin forwarded message:</div>
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<span style="font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif;color:rgba(0,0,0,1.0)"><b>From:
</b></span><span style="font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif">Clemens Dickhut <<a href="mailto:clemens.dickhut@icloud.com" target="_blank">clemens.dickhut@icloud.com</a>><br>
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<span style="font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif;color:rgba(0,0,0,1.0)"><b>Subject:
</b></span><span style="font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif"><b>ActiCap setup</b><br>
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<span style="font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif;color:rgba(0,0,0,1.0)"><b>Date:
</b></span><span style="font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif">14 Dec 2015 15:28:18 CET<br>
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<span style="font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif;color:rgba(0,0,0,1.0)"><b>To:
</b></span><span style="font-family:-webkit-system-font,Helvetica Neue,Helvetica,sans-serif">Clemens DICKHUT <<a href="mailto:clemens.dickhut@uni.lu" target="_blank">clemens.dickhut@uni.lu</a>><br>
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<img name="151a9a64cf4ddb13_Foto.JPG" height="1296" width="968" src="cid:AB6D5C43-8738-4380-AFD4-A34F3A1AA417@uni.lux"><br>
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Von meinem iPhone gesendet</div>
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For digest mode, send an email with the subject "set digest mime" to <a href="mailto:eeglablist-request@sccn.ucsd.edu">eeglablist-request@sccn.ucsd.edu</a><br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr">Makoto Miyakoshi<br>Swartz Center for Computational Neuroscience<br>Institute for Neural Computation, University of California San Diego<br></div></div>
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