[Eeglablist] CSD

[Delorme, Arnaud]

Dear Lina,

Applying current source density method is better than working with raw channel potentials - because if there is a superficial patch of cortex active, CSD will allow to extract it and mostly cancel the effect volume conduction. It can thus be considered as a rudimentary source extraction methods. 

It does not fully replace proper source localization analysis though, which should be done prior to using connectivity analysis methods. Connectivity analysis methods run at the channel level (raw potential) may return a variety of spurious connection which are uninterpretable (by spurious I mean that a channel being casually related to another might not mean that the patch of cortex underneath both channel are casually related).

Arno

> On Jul 8, 2020, at 6:11 PM, Lina Ismail <linaelsherif at Knights.ucf.edu> wrote:
> 
> Hello all,
> Have any one worked with current source density after cleaning the EEG data and extracting the epochs.
> I am a beginner and need some help for reducing the EEG volume conduction before applying some connectivity analysis
> 
> Best regards
> Lina ismail
> 
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