I'd like a link to this please. The reason being I'm open minded about it all but I have to say those in the medical practise are taught to be self assertive. They do, after all, have to make some "fine line" judgement calls. I'm not saying their wrong just that they can be over bearing with their assertions.
As you can asscertain I'm a believer of the after life but would like to know how "medicine" can messure what some of us would perceive as the soul or spirit... of ones self being.
I'm not down with the supernatural. No ghosts, no gods, etc. I think there's an explanation for everything that can show real world results and be repeatedly tested. I think we're marching towards that, but unfortunately there's no real funding for it. It's not considered something import from a medicinal perspective. It has to feed off the spare time of what's considered more important in brain activity detection and MRI advances.. the more important stuff being viewed as direct medicinal and clinical applications to prevent people from even getting near the NDE to begin with.
There's a lot of work on the subject since the mid 70s. In the 80s it was DMT. A guy proved you could trigger an NDE in some people with a dose, and get many others to experience symptoms from a "classical NDE". DMT is produced in your body by the pineal gland. Various, peer-reviewed journals have published studies of the experiences. A prominent feature of that is that they are distinctly cultural. If you're from an industrialized, Western country your experience will likely be Christian. If you're a Indian hindu, you'll likely see Yamraj. It's a construct of your culture, not necessarily supernatural.
The most recent theory to carry significant interest is Birk Engmann's work. It's about how the Sensory Autonomic System takes over while your brain is short circuiting from lack of blood flow once you've hit the clinically dead state. A particularly interesting aspect of this is that similar things to an NDE can be made to happen in computer neural networks by massively killing off neurons.
Engmann, Birk: Near- death Experiences: A review on the thesis of pathoclisis, neurotransmitter abnormalities, and psychological aspects. MMW-Fortschr.Med.Nr.51-52/2008(150.Jg.)p.42-43. PMID: 19156957
"Virtual Input Phenomena" Within the Death of a Simple Pattern Associator, Neural Networks, 8(1), 55–65
http://www.infidels.org/library/modern/keith_augustine/HNDEs.html (Hallucinatory Near-Death Experiences (2003) (Updated 2008))
Lots of peer-reviewed works referenced at the bottom of that link.