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Recording EOG's
Posted: Tue Jan 20, 2009 8:11 am
by edow
I was wondering if anyone knows how to just record the EOG channels without having to record all the other cap electrodes?
Posted: Tue Jan 20, 2009 4:42 pm
by Coen
Use the "Free Choice" channels selection to display just the EOG channels in the monopolar display, and select "Monopolar Displayed Channels" as save subset in the file save dialog.
Best regards, Coen (BioSemi)
Posted: Tue Jan 20, 2009 11:05 pm
by edow
Hi Coen,
This is going to significantly reduce disk space. Your help is much appreciated, thanks alot!
Liz
Re: Recording EOG's
Posted: Mon Jun 23, 2014 11:40 am
by cemiller
Is there a way to only record EOGs, without using scalp electrodes? From what I understand DRL and CMS need to be used regardless?
I am hoping to use the system to look only at eye movements, and wanted to avoid having to use the cap if possible.
Thanks
Re: Recording EOG's
Posted: Mon Jun 23, 2014 3:25 pm
by Coen
Use a flat-type CMS/DRL conencted to the frort-panel of the AD-box.
Best regards, Coen (BioSemi)
Re: Recording EOG's
Posted: Mon Jun 23, 2014 4:23 pm
by cemiller
Excellent, I forgot that you make those flat as well. Is there an optimal place for positioning the CMS/DRL electrodes? Does it matter where they go on the head/face?
Sorry about all the questions, and thanks for your help.
Best wishes
Re: Recording EOG's
Posted: Wed Jun 25, 2014 10:38 am
by Coen
The CMS should be approx. in the center of the measuring electrodes, for example on the nose or the forehead.
The DRL can be anywhere on the body. In theory, a location at some distance of the measuring sites is optimal. In practice, a location not too far from the CMS often results in lower interference levels (I don't have a good explanation). Some trial and error to archive the best location for minimal interference levels (in the unreferenced display) may be useful.
Best regards, Coen (BioSemi)