[Eeglablist] dipfit uses average reference?

[arno]

David Groppe wrote:
> I'm using Dipfit 2 to localize independent components using the spherical 
> head model.  Apparently the software requires the data to use the average 
> reference.  Why is this?
Source localization assumes that the data is average reference (I think 
it is because no current should get in or out). I do not think it is 
really an option not to use average reference. Robert might have more 
insight about that.

Arno
> From what I understand, the average reference 
> tends to highlight shallow sources over deep sources (e.g., medial 
> temporal), as deep sources have broad, relatively uniform scalp 
> topographies.  If we're interested in possibly extracting deep sources, is 
> there a way we can get Dipfit 2 to NOT use the average reference?
>    much thanks,
>      -David Groppe
>
> dgroppe at cogsci.ucsd.edu
>