The life after death, is title of a study case that conducted by a team of researchers from University of Michigan on nine rats. First they connected electrodes to surface of the rat's brains. Then they given an injection of potassium chloride stopping their heart and making them clinically dead. But the brain is still working. For as long as 30 seconds after blood ceased to flow to it, the rats' brains showed signs of activity for as long as 30 seconds after their hearts had stopped. It wasn't just a blip here and there, either.
"In fact, at near-death, many known electrical signatures of consciousness exceeded levels found in the waking state, suggesting that the brain is capable of well-organized electrical activity during the early stage of clinical death." says George Mashour senior author.
This study tells us that reduction of oxygen or both oxygen and glucose during cardiac arrest can stimulate brain activity that is characteristic of conscious processing,” says Borjigin. “It also provides the first scientific framework for the near-death experiences reported by many cardiac arrest survivors.”The brain will also stay alive for about 7 minutes after you die, provided your brain is intact. So if you have 7 minutes and you can experience your whole life in one second, that's 60 lives per minute. 420 lives in 7 minutes. That's a lot of time and a lot of experiences with death.
Sources:
http://www.uofmhealth.org/news/archive/201308/electrical-signatures-consciousness-dying-brain
http://gizmodo.com/researchers-detect-intense-brain-activity-in-rats-after-1112675885
http://scitechdaily.com/study-shows-electrical-activity-in-the-brain-after-clinical-death/
http://en.wikipedia.org/wiki/Clinical_death
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