Interesting documentary video that correlates the 4th state of matter found within the brain, plasma, with balls of ghosts lights also made of plasma. Could plasma in our brains, used by the nerve structure to allow nerve cells to pass electrical signals, leave the body as an orb at death?
The amount of plasma found within the human brain is, in theory, similar to the amount seen in true, light-emitting ghost orbs. Plasma has been observed leaving a corpse up to 3 days after the human body expires.