A number of studies have shown NDE experiences in normal oxygen situations. An NDE with normal oxygen rules out low oxygen as an NDE cause. A google search would probably reveal a couple.
The life review is very interesting.
The depth of detail and the ability to "read the mind/emotions" of others while re-experiencing an event within the life review suggests that the experience is not so much a memory review but a revisiting of the actual experience/event. Often the additional information gained from the review would not be possible if the experience was based on pure memory.
It is as if the past continues to exist and is available for revisiting during the life review.
