Thanks for the replies Porkette & Shawn.

Shawn...I don't really know what is going on. I'm trying to find the cause of the sensation that my brain is shaking inside my head. It also feels like my brain is rebooting at the same time or shortly after the shaking sensation.

My dad witnessed one of my episodes and he said that I was talking and clearing the table and then all of a sudden my movements slowed down and I stopped talking and my eyelids fluttered. It only lasted maybe 10 seconds though.

I have recently be dx with a sensory motor polyneuropathy that we are still investigating. I don't know if these brain quaking episodes are related or what they are. Or if the two are part of a bigger picture.

I should also mention I have a very long history of classic migraines. Maybe that is why I had the driving response to the photic stimulation.

Does anyone know what the average background volts range should be?

Thank you for sharing and for the link.