FFR measurements using FLAT EX cables or pin electrode cap?
Posted: Tue Mar 29, 2016 1:49 pm
Hello,
I have successfully performed some preliminary envelope FFR experiments with the BioSemi Active 2 and the 32 channel electrode cap with 2 earlobe channels using 2 FLAT EX cables and I would now like to extend the experiment to more subjects.
As I am only using several channels, (ie. Cz, Fz, mastoids, earlobes), I was wondering if it is possible to record these without the electrode cap by using only the FLAT EX electrodes. The time savings of subject prep-time and clean up allow for more stimulus repetitions and subjects. In addition to savings in prep time, the lower file sizes associated with the lower number of channels, also would allow me longer subject recording times between saving of the *.bdf data.
My proposed setup would be using the Speed Mode 7 setting and EX1-EX6. Unfortunately, our lab does not currently have the CMS/DRL FLAT EX DIN connector, so I was thinking of removing two electrode holders from the cap and using the adhesive rings to fix them to the forehead. Is it possible to know the general locations of the CMS/DRL electrodes on the forehead that were used for the data in http://www.biosemi.com/abr.htm ?
Perhaps it is also just better to just "suck it up" and use the cap
? I also realize that if we continue these measurements, that we should probably invest in the ABR electrode setup 
), but any suggestions regarding my proposed setup are appreciated!
Thanks for the help!
Daryl
I have successfully performed some preliminary envelope FFR experiments with the BioSemi Active 2 and the 32 channel electrode cap with 2 earlobe channels using 2 FLAT EX cables and I would now like to extend the experiment to more subjects.
As I am only using several channels, (ie. Cz, Fz, mastoids, earlobes), I was wondering if it is possible to record these without the electrode cap by using only the FLAT EX electrodes. The time savings of subject prep-time and clean up allow for more stimulus repetitions and subjects. In addition to savings in prep time, the lower file sizes associated with the lower number of channels, also would allow me longer subject recording times between saving of the *.bdf data.
My proposed setup would be using the Speed Mode 7 setting and EX1-EX6. Unfortunately, our lab does not currently have the CMS/DRL FLAT EX DIN connector, so I was thinking of removing two electrode holders from the cap and using the adhesive rings to fix them to the forehead. Is it possible to know the general locations of the CMS/DRL electrodes on the forehead that were used for the data in http://www.biosemi.com/abr.htm ?
Perhaps it is also just better to just "suck it up" and use the cap
? I also realize that if we continue these measurements, that we should probably invest in the ABR electrode setup ), but any suggestions regarding my proposed setup are appreciated!Thanks for the help!
Daryl