OBE's: by electrically stimulating the angular gyrus, a part of the temporal parietal junction in the brain, a doctor can induce OBEs.OBEs are controlled by a region of the higher brain, which is clinically dead when NDEs occur. What's more, it seems logical to believe that the higher brain must still function in order to interpret the sensations produced by the REM intrusion triggered in the brain stem.
SHOOT: This implies that spiritual or religious experiences are really experienced in our brains.
It is estimated that as many as 18 percent of people who have been resuscitated after cardiac arrest have reported a near-death experience.
A brain-dead person should not be able to form new memories -- he shouldn't have any consciousness at all, really. So how can anything but a metaphysical explanation cover NDEs?