This an opening shot in what appears to be a sea of information. At least it will get the ball rolling.
When all of Pam's vital signs were stopped, the doctor turned on a surgical saw and began to cut through Pam's skull. While this was going on, Pam reported that she felt herself "pop" outside her body and hover above the operating table. Then she watched the doctors working on her lifeless body for awhile. From her out-of-body position, she observed the doctor sawing into her skull with what looked to her like an electric toothbrush. Pam heard and reported later what the nurses in the operating room had said and exactly what was happening during the operation. At this time, every monitor attached to Pam's body registered "no life" whatsoever. At some point, Pam's consciousness floated out of the operating room and traveled down a tunnel which had a light at the end of it where her deceased relatives and friends were waiting including her long-dead grandmother. Pam's NDE ended when her deceased uncle led her back to her body for her to reentered it. Pam compared the feeling of reentering her dead body to "plunging into a pool of ice." The following is Pam Reynolds' account of her NDE in her own words.
For practical purposes outside the world of academic debate, three clinical tests commonly determine brain death. First, a standard electroencephalogram, or EEG, measures brain-wave activity. A "flat" EEG denotes non-function of the cerebral cortex - the outer shell of the cerebrum. Second, auditory evoked potentials, similar to those [clicks] elicited by the ear speakers in Pam's surgery, measure brain-stem viability. Absence of these potentials indicates non-function of the brain stem. And third, documentation of no blood flow to the brain is a marker for a generalized absence of brain function.
But during "standstill", Pam's brain was found "dead" by all three clinical tests - her electroencephalogram was silent, her brain-stem response was absent, and no blood flowed through her brain. Interestingly, while in this state, she encountered the "deepest" NDE of all Atlanta Study participants.
Some scientists theorize that NDEs are produced by brain chemistry. But, Dr. Peter Fenwick, a neuropsychiatrist and the leading authority in Britain concerning NDEs, believes that these theories fall far short of the facts. In the documentary, "Into the Unknown: Strange But True," Dr. Fenwick describes the state of the brain during a NDE:
"The brain isn't functioning. It's not there. It's destroyed. It's abnormal. But, yet, it can produce these very clear experiences ... an unconscious state is when the brain ceases to function. For example, if you faint, you fall to the floor, you don't know what's happening and the brain isn't working. The memory systems are particularly sensitive to unconsciousness. So, you won't remember anything. But, yet, after one of these experiences [a NDE], you come out with clear, lucid memories ... This is a real puzzle for science. I have not yet seen any good scientific explanation which can explain that fact.
"The modern tradition of equating death with an ensuing nothingness can be abandoned. For there is no reason to believe that human death severs the quality of the oneness in the universe." - Larry Dossey, MD
People have near-death experiences while brain dead
A few notes so far.
1. I have yet to see any suggestion her experiences were anesthesia awareness. They have almost no commonality with the ones I am aware of.
2. Since the medical experts and the author specifically covered the level of confirmation of the lack of any brain activity it was almost certainly because at least some of the events occurred during this time.
3. Her experiences were the opposite from anesthesia awareness. There was no pain from the events themselves and she had a third person perspective.