mmiyakoshi at ucsd.edu
Fri Oct 3 15:21:58 PDT 2014
Here is update.
I asked the question to Jason. He told me that the main reason avg
reference is useful is that it returns brain maps that look like nice
localized sources inside the head with red blob and slight negative
(aqua/green) background. This makes sense.
On Thu, Oct 2, 2014 at 10:00 AM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
> Dear Eric,
> I have the same question for long time. In my case, because I run ICA and
> remain in IC analysis and almost never come back to channels, I really
> wonder if I need re-referencing at all.
> I've heard Jason Palmer, who wrote AMICA for EEGLAB, say average reference
> before ICA is necessary, but he did not give me a clear explanation for
> that. Scott wanted to know it too, but we were interrupted at that time.
> Next time I'll ask it to him (when I ever see him in the lab...)
> On Tue, Sep 30, 2014 at 2:44 PM, Eric HG <erichg2013 at gmail.com> wrote:
>> Dear list,
>> I have read the tutorial on the site and it says: "Converting data,
>> before analysis, from fixed or common reference (for example, from a common
>> earlobe or other channel reference) to 'average reference' is advocated by
>> some researchers, particularly when the electrode montage covers nearly the
>> whole head (as for some high-density recording systems)."
>> I have data collected with a mastoid reference and I was wondering in
>> which cases it would be considered best to rereference to the average? Are
>> there any specific papers about rereferencing that anyone would recommend?
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> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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