[Eeglablist] Three EEGLAB questions

Fred Travis ftravis at mum.edu
Sat Sep 28 19:38:48 PDT 2013


Thank you Robert.

As you know, there is a growing body of work on synchrony.  How can I 
calculate that in EEGLAB?

Fred

On 9/27/2013 8:21 PM, robert coben wrote:
> Fred and Arnaud,
>
> Having worked with coherence and more recently sloreta coherence and 
> SIFT, I will provide some feedback. Coherence as a measure of 
> "connectivity" between pairs is extremely flawed. I would agree with 
> Arnaud is recommending SIFT and granger causality. The information is 
> much richer and more closely resembles structural connectivity metrics.
>
> Rob
>
>
> On Sep 27, 2013, at 5:38 PM, Fred Travis <ftravis at mum.edu 
> <mailto:ftravis at mum.edu>> wrote:
>
>> Hi Arnaud
>>
>> 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
>>
>> Fred
>> On 9/27/2013 2:54 PM, Arnaud Delorme wrote:
>>> Hi Fred,
>>>
>>> what do you mean by synchrony?
>>> 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.
>>>
>>> Hope this helps,
>>>
>>> Arno
>>>
>>>
>>>> 1. synchrony (rather than coherence)
>>>> 2. cross frequency coherence--coherence between frequency bands 
>>>> (Palva and Palva)
>>>> 3. cepstrum analysis--frequency analysis of the power spectra
>>>>
>>>> Many thanks
>>>>
>>>> Fred
>>>> -- 
>>>> Fred Travis, Ph.D.
>>>> Director, Center for Brain, Consciousness and Cognition
>>>> Dean, Graduate School
>>>> Chair, Maharishi Vedic Science Department
>>>> Office:  641 472 1209
>>>> Fax: 641 470 1316
>>>> Skype: fredtravis
>>>> Website:drfredtravis.com  <http://drfredtravis.com/>
>>>> _______________________________________________
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>>
>> -- 
>> Fred Travis, Ph.D.
>> Director, Center for Brain, Consciousness and Cognition
>> Dean, Graduate School
>> Chair, Maharishi Vedic Science Department
>> Office:  641 472 1209
>> Fax: 641 470 1316
>> Skype: fredtravis
>> Website:drfredtravis.com  <http://drfredtravis.com>
>> _______________________________________________
>> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
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>

-- 
Fred Travis, Ph.D.
Director, Center for Brain, Consciousness and Cognition
Dean, Graduate School
Chair, Maharishi Vedic Science Department
Office:  641 472 1209
Fax: 641 470 1316
Skype: fredtravis
Website: drfredtravis.com

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