I have no idea what happened that the last post came to you blank :-(
I had spent about ten minutes writing a post with several links but do not now have the time to do it all again.
Google "Susan Blackmore + NDE" and you will see some of the research she has done from personal experience. Hope it helps though it will be harder work now without all the links I had posted.
Intellectually amd skeptical. Emotionally I am spiritual. Not many phenomena have me sitting on fences but this one does. My bottom is full of splinters over this subject! I tend toward the brain chemistray school BUT I have seen enough odd happenings in the emergency room, in operating thetares and on the wards to have felt sometimes there was another 'force' at play.
Sorry to pour more fuel on the fire, albeit in a non-inflammatory way, but it's a good topic needing more research. Personally I hope none of get to experience the phenomena in the near future!