<div dir="ltr">Hi Fred,<div>Not sure about EEGlab per se, but I had to look at syncrony as you define it in my own work and it is relatively easy by writing a simple script in MatLab. </div><div><br></div><div>For example you can apply a filter in the alpha band (use filtfilt to avoid to introduce phase shifts) if you are interested in coherence in that band to your two time series and then use the Hilbert transform to calculate the phase for each time series. The difference between the two times series would give you a measure of phase coherence (you could even calculate this in terms of percent difference). </div>
<div><br></div><div>Giovanni Santostasi </div><div><br></div></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Fri, Sep 27, 2013 at 4:38 PM, Fred Travis <span dir="ltr"><<a href="mailto:ftravis@mum.edu" target="_blank">ftravis@mum.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#6600CC" bgcolor="#FFFFFF">
<font face="Verdana">Hi Arnaud<br>
<br>
By synchrony I mean in phase EEG. Coherence us a general
case-stability of phase relation--and synchrony is a specific
case--stability of phase relation and in phase<span class="HOEnZb"><font color="#888888"><br>
<br>
Fred<br>
</font></span></font><div><div class="h5">
<div>On 9/27/2013 2:54 PM, Arnaud Delorme
wrote:<br>
</div>
<blockquote type="cite">
Hi Fred,
<div><br>
</div>
<div>what do you mean by synchrony? </div>
<div>To caclulate some of additional connectivity measures, you
might want to try SIFT, an EEGLAB associated toolbox and plugin.
It will allow you to compute Granger Causality based measures
such as partial directed coherence. It will also allow you to
compute many other measures including the popular directed
transfer entropy.</div>
<div><br>
</div>
<div>Hope this helps,</div>
<div><br>
</div>
<div>Arno</div>
<div><br>
</div>
<div><br>
</div>
<div>
<div>
<div>
<blockquote type="cite">
<div>1. synchrony (rather than coherence)</div>
</blockquote>
<blockquote type="cite">
<div> 2. cross frequency coherence--coherence between
frequency bands (Palva and Palva)<br>
3. cepstrum analysis--frequency analysis of the power
spectra<br>
<br>
Many thanks<br>
<br>
Fred<br>
<pre cols="72">--
Fred Travis, Ph.D.
Director, Center for Brain, Consciousness and Cognition
Dean, Graduate School
Chair, Maharishi Vedic Science Department
Office: <a href="tel:641%20472%201209" value="+16414721209" target="_blank">641 472 1209</a>
Fax: <a href="tel:641%20470%201316" value="+16414701316" target="_blank">641 470 1316</a>
Skype: fredtravis
Website: <a href="http://drfredtravis.com" target="_blank">drfredtravis.com</a></pre>
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<pre cols="72">--
Fred Travis, Ph.D.
Director, Center for Brain, Consciousness and Cognition
Dean, Graduate School
Chair, Maharishi Vedic Science Department
Office: <a href="tel:641%20472%201209" value="+16414721209" target="_blank">641 472 1209</a>
Fax: <a href="tel:641%20470%201316" value="+16414701316" target="_blank">641 470 1316</a>
Skype: fredtravis
Website: <a href="http://drfredtravis.com" target="_blank">drfredtravis.com</a></pre>
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