[Eeglablist] reference channel information (from net station raw data)

[Jerry Zhu]

Hi all,
I used net station to export my 128-channel data as .raw format with and
without exporting reference channel (which is Cz in my case). That is, I
had two .raw files.

Then when I opened them in eeglab, it did not recognize the reference
channel as Cz (automatically) for both files. Both files showed they had
128 channels. I expect that the file with the reference channel would show
it has 129 channel (with Cz).

Next, my head model has location information about Cz, so I declared Cz as
my reference channel (through GUI "set reference"). The eeglab main window
showed that the reference was set to Cz. But when I plotted the data, the
figure did not show Cz. Again I expect the channel number would increase to
129 and the plot would show a flat line indication Cz is the reference
channel.

Finally, I could add Cz to the data by re-referencing to average (through
GUI re-reference | add current reference channel back to data)

Can someone explain this to me?
Thank you so much for the help!

Best,
Jerry
--
Jian Zhu, M.A.
Brain and Cognitive Sciences
Department of Psychology
Southern Illinois University Carbondale
Web: http://zhupsy.com

We have two halves in the brain: left and right. Nothing is right in the
left. Nothing is left in the right.
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