Well, I think the Auras is my brain failing to filter out visual noise, which then get's into a feedback loop and builds up. And that might be related to other filter functions failing. I think that, becaus4 once in a while, I'm able to suppress the Aura conciously, when it is still very small.
Some auras have a musculo-skeletal origin. For example, some neck issue irritates a nerve or alters the pressure in a blood vessel, which in turn affects the optic nerve.
I have suffered them myself, and they always came in a sequence: arm pain, neck pain, headache and aura. Finally, I'd release tension in my neck and it'd be gone.
My doctor confirmed injuries in cervical discs also seem to be causally linked to auras, but there might be other causes as well.
