University Receives $5 Million Grant To Study Immortality

The medical definition, which is quite easy for me since I'm also a physician. Death can be reversible or non reversible. The legal definition of death is the minute I put my signature to the death certificate. Either way clinical death is defined as lack of pulse, blood pressure, breathing deep tendon reflexes, etc. It is identical in both reversible and non reversible cases, which is why efforts are usually taken to reanimate a recently dead person, especially if the death happens in front of medical staff and is not obviously irreversible (example, decapitation, a body that is obviously cold/stiff to the touch, etc).

but we know the brain doesn't 'die' immediately.

The tissue does not "die", however it stops working almost immediately when blood flow stops. The brain consumes huge amounts of oxygen and will immediately deplete any oxygen present in the blood. That's the reason people will suffer "transient ischemic attacks" (sort of like a mini-stroke) even with partial blockages of their carotid arteries - because there is a momentary disruption of blood flow. Now you could argue that a cell that is still alive in that it can maintain the permeability of its cell membrane for the moment, is not technically dead and you are correct. However that cell, at that moment, is not "working". All remaining ATP is being used to try to keep the cell alive, and it has no energy spare to do things like depolarize and transmit signals.

Maybe the angels, lights and funny guy with the beard show up later.

Buddy you are free to believe whatever you want. For me I just remember not finishing a sentence in the ER, and then being ventilated with a crowd of colleagues and nurses around me a few minutes later. There was no passage of time. There was no pain. There was no suffocation. In fact when I "came to" it took me a while to realize what had happened, with the obvious disbelief that it was happening to me. I do remember a certain disconnect from my body and it took a few minutes to register all the poking and prodding that was going on as IV lines were inserted, etc. And after a few minutes the incredible pain from the burns I had from the defibrilator started to be felt. But it's an amazing feeling to not have to do your own breathing. But I wouldn't read more into it than that. At least now I know that death is completely painless, and I'm not afraid for next time. I was taken completely by surprise, so now I figure that no one realizes when they are going to die. Oh they might feel really ill, or they might realize they are in real danger. But there's no "I'm dying" sensation. It just happens, quite suddenly, and just like the exact moment when you fall asleep, you have no idea exactly when it happens. But all the religious stuff I chalk up to people making shit up because they want/need attention, or they have to justify their beliefs to others in order to convince themselves that it's "true".

Source: http://rss.slashdot.org/~r/Slashdot/slashdotScience/~3/obdEDiNyKjo/university-receives-5-million-grant-to-study-immortality

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