Alpha waves not really sensitive to closed eyes (eeg-pipes using JS)
gerardkleelab
San Diego
Hi,
I am using eeg-pipes to get the data and my frequency resolution is 0.25Hz. When I look at how alpha wave responds to my closed eyes (I am referring to the power bands in OpenBCI-GUI), it notably shoots up and I can clearly tell that the alpha waves go up when I close my eyes.
I now look at my own GUI (JS-GUI) and it clearly responds to eye blinks when I set the frequency range to [2, 7]. However, when I set it to [7.5, 12.5] to check alpha wave and how it responds to my closed eyes, the change of the amplitude is not that notable. That being said, I can't really tell if the amplitude actually goes up when I close my eyes on my own GUI.
I am not sure what the frequency resolution is for OpenBCI-GUI, but is it the matter of frequency resolution? Are there any ways to make the program more sensitive to closed eyes?
Comments
Gerard, hi.
I mentioned on your other eeg-pipes thread, that Alex may have some comments. If you click on his username (after the at sign), you can send him an email message with the Message button. All these issues appear to be with eeg-pipes, as OpenBCI_GUI is working fine.
Regards, William
Hi William,
I am sorry, I thought you guys collaborated together. I will definitely contact him regarding eeg-pipes.
Do you happen to know the frequency resolution of OpenBCI-GUI, William?
This also could depend on your own brain physiology. I have friends, whom I have tested who do not exert any idle alpha rhythm with eyes closed.
Also, increased Delta and theta are more noticeable at the front with eye blinks, and alpha changes are more noticeable at the back of the brain usually.