amplitude of the scalp EEG??
ianbhak
South Korea
Hi,
The amplitude of the scalp EEG potentials are generally in the range of ±100 µV. O’Sullivan (2019).
I usually get over 200 microvolt during the baseline recording and it goes up to 1000-1200 microvolt while watching a stimulus. I am not sure these are common values. And suggestion or opinion on the data of my experiment?
Thanks.
Used Nuprep to clean the skin ( cleaning purpose )
Used dry eeg comb.
OpenBCI_GUI version 4.2
Pic1: Watching a stimulus
Pic2: Baseline ( eyes opened )
Comments
You may have a bad reference electrode. Since all channels are way larger than they should be, suspect the electrode in common: reference. Also check your ground / bias.
Ian, if you have gold cups and paste, you can also run the steps in the tutorial to see if your measurements agree with sample screens,
https://docs.openbci.com/docs/01GettingStarted/02-Biosensing-Setups/EEGSetup
William