Could that then mean that the 3rd eye could be related to where the silver cord is as a perception in the NDE as Raja linked?
This might be why some people don't see image, instead they feel spirit image instead, as it is relayed from the chakra "vibration" that they are connected "to" in spirit.
Maybe this is how some other's "hear" spirit, as a relay from the chakra point.
If they say that no pain is felt in cases of the NDE or death, then it might have nothing at all to do with the brain, as the brain is the feed-back centre after all relative to feeling pain. Wouldn't that be funny, after all the studies done on the DMT molecule.