[Eeglablist] re-reference to both mastoids (Brain Vision Recorder)

[Makoto Miyakoshi]

Dear Andrea,

> 1. I added channel location (63 channels coordinates, without the online
reference electrode: right mastoid).
> 2. I added the missing Right Mastoid to the channel list.
> 3.  I set this new channel as reference.
> 4. On re-reference panel, I re-reference data to Left Mastoid, I ticked
'retain old reference channels in data', and I "added current reference
back to the data" (thus right mastoid).
> 5. I clicked again on re-reference panel, now in the option 're-reference
data to channel(s)' I selected both M1 and M2.

Yes this seems right.
The bottom line is that as long as you put back the initial reference
channel to the data that are re-referenced, you can re-reference in any way.

I updated re-referencing part of my pipeline wiki. I recommend average
reference.
http://sccn.ucsd.edu/wiki/Makoto's_preprocessing_pipeline

Makoto



On Fri, May 27, 2016 at 2:15 AM, Andrea Desantis <aerdna.desantis at gmail.com>
wrote:

> Dear all,
>
> I am a new user  of EEGLAB. I am pre-processing data collected with Brain
> Vision. During data recording I used the right mastoid as online reference.
>
> Now, I would like to re-reference to both left and right mastoids. I have
> followed the procedure described below and I would like to know whether it
> make sense or if i made any mistakes.
>
> 1. I added channel location (63 channels coordinates, without the online
> reference electrode: right mastoid).
>
> 2. I added the missing Right Mastoid to the channel list.
>
> 3.  I set this new channel as reference.
>
> 4. On re-reference panel, I re-reference data to Left Mastoid, I ticked
> 'retain old reference channels in data', and I "added current reference
> back to the data" (thus right mastoid).
>
> 5. I clicked again on re-reference panel, now in the option 're-reference
> data to channel(s)' I selected both M1 and M2.
>
> Is that correct? did I do something wrong?
>
> Your feedback would be very much appreciated,
> Andrea
>
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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