[Eeglablist] common mode sense (CMS)

[Makoto Miyakoshi]

Dear Mary,

If you have no preference, just use average referencing. This is the
easiest and good enough. In doing so, including the initial reference (all
zeros) will make it perfect. But default EEGLAB option does not do this for
you, if I remember correctly. It's not a big deal if you can't do it. You
just lose data rank by one, which does not hurt very much in many cases.
https://sccn.ucsd.edu/wiki/Makoto%27s_preprocessing_pipeline#Why_should_we_add_zero-filled_channel_before_average_referencing.3F_.2803.2F04.2F2020_Updated.29


If you are confident with signal processing and linear algebra, 'infinity'
reference (Yao, 2001) is an alternative choice.

Makoto

On Thu, Jul 9, 2020 at 10:24 AM maryam farshad <maryamfarshad81 at gmail.com>
wrote:

>  Dear members,
>
> I am using BrainVisionanalyser to anqalyze EEG/ERP data. I would be
> grateful if you could help me to solve my problem. We recorded EEG from six
> channels, (simeltaneously with tDCS stimulation), EEG channels including
> F3, F4, C3, C4, Fz, and Cz; The reference was common mode sense (CMS): the
> Reference (CMS) electrode was attached to the earlobe with the clip.
>
> Now I need to do re-referencing?! Which electrode I should apply for
> offline re-referencing?!
>
> I would be thankful, if you could help me.
> Many thanks in advance for your help,
>
> Best,
> Mary
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