elbeau said..
People that have near death experiences come back with information that they couldn't have unless they had actually experienced the event.
For instance they can describe a conversation between their doctor and their spouse that has taken place in a room three doors away from where they are having their heart attack.
People that have been blind from birth can describe the things they have seen while "clinically dead".
People can identify and describe relatives they have never met before or even knew existed.
Heightened electical activity doesn't cut it.
The first point hearing something three doors away is not a real stretch it has been proven by scientists that all of your ( 9 - 21 ) senses are connected and when you are for one reason or another you are unable to use one or some of these senses others are heightened. for example you can smell better when it is quiet and so on.
So for someone under anesthetic to have a heightened sense of hearing while the senses of sight and touch for example are restricted then is far from abnormal
as for the rest of your statement you couldn't be more vauge if you tried
the reality is there has been many studies on this subject a few that have been completed in the last few yeas none have ever had any scientific data to prove it is possible.