[FieldTrip] Renormalized PDC

Barbara Schorr barbara.schorr at uni-ulm.de
Wed Apr 29 11:01:30 CEST 2015


Dear Fieldtrippers,

I am working on a connectivity analysis (partial directed coherence) in 
EEG data.
I found this paper by Schelter, B.; Timmer, J.; Eichler, M. (2009). 
"Assesssing the strength of directed influences among neural signals 
using renormalized partial directed coherence"./J. Neurosci 
Methods/*179*(1): who suggest to rather use a renormalized PDC.

Has anybody here used this before and could tell me how to calculate 
this rPDC in Fieldtrip?

All the best,
Barbara

Am 27.04.2015 um 12:00 schrieb fieldtrip-request at science.ru.nl:
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>     1. Re: Source localizing resting state data (Luke Bloy)
>        (Haiteng Jiang)
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> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 26 Apr 2015 16:38:48 +0200
> From: Haiteng  Jiang <haiteng.jiang at gmail.com>
> To: fieldtrip at science.ru.nl
> Subject: Re: [FieldTrip] Source localizing resting state data (Luke
> 	Bloy)
> Message-ID:
> 	<CAHSK_TQRS64PioiA9qB3C3LRHqDhRdjnDs4E6mrBcD9javy+hA at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Hi Luke,
>      In my experience,  the best way to deal with central bias issue is
> leadfield normalization on resting state .  This is much more robust
>   compared to neural activity index (NAI) across subjects.  You can specify
> cfg.normalize       = 'yes' when you compute leadfied
> using ft_prepare_leadfield function . This strategy gave me satisfactory
> results  in the end.
>
>                                 Hope this helps,
>                                   Haiteng
>
>
>> Message: 2
>> Date: Wed, 22 Apr 2015 16:55:14 -0400
>> From: Luke Bloy <luke.bloy at gmail.com>
>> To: FieldTrip list serve <fieldtrip at science.ru.nl>
>> Subject: [FieldTrip] Source localizing resting state data
>> Message-ID:
>>          <
>> CAG5Ru-pJKH91o9EHD+kc53TQXc8F3X4Ogsa0UOC5wiJmLPvEvA at mail.gmail.com>
>> Content-Type: text/plain; charset="utf-8"
>>
>> Hi everyone,
>>
>> Following up on two recent email threads (
>> http://mailman.science.ru.nl/pipermail/fieldtrip/2015-April/009120.html
>> and
>>   http://mailman.science.ru.nl/pipermail/fieldtrip/2015-January/008796.html
>> )
>>
>> I'd like to ask the fieldtrip community what they feel is the best source
>> localization methods for resting state data? Note that at this point i'm
>> only thinking about simple things like localizing resting alpha and beta
>> rhythms.
>>
>> -Thanks
>> Luke
>>
>>
>

-- 

Barbara Schorr, MSc
Clinical and Biological Psychology
University of Ulm
Albert-Einstein-Allee 47
89069 Ulm

Therapiezentrum Burgau
Kapuzinerstra├če 34
89331 Burgau

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