(November 21, 2011 at 2:10 am)Willpower Wrote: From the moment that a person undergoes a cardiac arrest (which catches individuals off-guard), their blood circulation rapidly drops, and their brain function/activity approaches zero. At best, there would be the opportunity for distorted perception as everything speeds to a halt--but this would be far from creating such a vivid, real, and memorable experience.
The fact that there is a lack of blood flow to the brain doesn't actually mean that there is no activity in the brain at all. There still may be some activity.
See this:
How long does brain activity last after cardiac arrest?
Edit:
It says that all brain activity ends in about 3 to 4 minutes after the heart stops beating. I don't know if that's true or not.
If that is true, then I suppose the hallucinations occur within first few minutes, but I'm not sure.
