Here is an interesting clip from the Guardian, quoting an interview with Sam Parnia, instigator of the recent investigation into NDE's
Parnia has been collecting detailed accounts of these experiences for four years. I ask what conclusions he has drawn.
He suggests he is agnostic about the source of these subjective memories, as he is about questions of mind and matter. "When I first got interested in these mind/body questions, I was astonished to find that no one had even begun to put forward a theory about exactly how neurons in the brain can generate thoughts," he says. "We always assume that all scientists believe the brain produces the mind, but in fact there are plenty who are not certain of that. Even prominent neuroscientists, such as Sir John Eccles, a Nobel prizewinner, believe that we are never going to understand mind through neuronal activity. All I can say is what I have observed from my work. It seems that when consciousness shuts down in death, psyche, or soul by which I don't mean ghosts, I mean your individual self persists for a least those hours before you are resuscitated. From which we might justifiably begin to conclude that the brain is acting as an intermediary to manifest your idea of soul or self but it may not be the source or originator of it
I think that the evidence is beginning to suggest that we should keep open our minds to the possibility that memory, while obviously a scientific entity of some kind I'm not saying it is magic or anything like that is not neuronal."
Does he have a religious faith?
"No," he says, "and I don't have any religious way into this. But what I do know is that every area of inquiry that used to be tackled by religion or philosophy is now tackled and explained by science.