Near-Death Experience: A Physical Explanation
Susan Blackmore
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Susan Blackmore has interviewed many people who have had Near-Death
Experiences (NDEs) and researched hundreds of case histories. She
bridges the scientific and spiritual interpretations by arguing that
there are clear physical explanations for the changes that take place
within the brain, and that true spiritual transformation comes not from
searching after a spirit or soul that survives death, but from accepting
that the whole concept of 'self' is in itself an illusion.
The following is an extract from Dying to Live - Science and the
Near-Death Experience (London: Grafton, 1993).
"I have to face a real problem here. I have encountered it often enough
already and I expect to meet it many more times. Many NDErs come back
from their experiences convinced that they have seen the spirit world,
convinced that they have grasped their 'overself', 'higher self' or
'ultimate being'; convinced that 'they' have met their dead loved ones
and that they will live after they die. I am denying that they are
right. I am not denying their experiences but I am disagreeing with the
conclusions they have come to. They may, with some justification, think
I am insulting them by saying 'You have not seen what you thought you
saw'; I am not surprised when people come back at me with 'But I know it
because I have been there.' To this I can only say - I have experienced
it too and I have come to a different conclusion from you.
"I also have another problem: many people find the idea of an eternal
soul and an afterlife a great comfort. Adopting this view may even help
them to live their lives more fully and more lovingly. They find this
view a comfort when facing their own death, the death of others they
love and even in the midst of life. It may actually be easier to live
life in the false hope that you will live for ever than in the scary
openness of nothing but the present. So by saying what I believe to be
true I may be denying people that comfort. I can only hope that people
who prefer that view will simply disagree with me and say - I have come
to a different conclusion from you.
'The NDE can cut right through the illusion that we are separate selves'
My conclusion is that the NDE brings about a breakdown of the model of
self along with the breakdown of the brain's normal processes. In this
way it can cut right through the illusion that we are separate selves.
It becomes clear that 'I' never did exist and so there is no one to die.
The funny thing is that when a whole system drops the idea of there
being anyone in there to die, it seems to become a nicer person to have
around. To the extent that this happens, the person is changed. Here is
the real loss of the fear of death. Here lies the true transformation of
the NDE.
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Blackmore, who as a parapsychologist came to believe psychic power was
a non-explanation, tries to do justice to the compelling power of an OBE
without detachable spirits soaring beyond the brain. She argues that OBEs
typically take place under conditions when information from the external
world is not available to our brain, but our normal awareness has not been
switched off. So our brain focuses attention on the most stable model of the
world available. Our memory of location is organized according to a bird's
eye view. Without external input, this memory-model is most stable,
and it becomes our working picture of "reality." While having an OBE
we survey a scene including ourselves from above, and this feels no
less real than our ordinary models based on continuing sensory
input.[56]
NDEs usually begin with OBEs; near death, the brain is cut off from
outside information. Blackmore also explores how the NDE progresses
beyond an OBE.[57] NDEs have occurred in people who were not not
dying; so while something in the dying process triggers a tunnel-image
and so forth, it is not something unique about death. A good
candidate is oxygen-deprivation. Oxygen-starved neurons in the visual
cortex fire in abnormal patterns, producing effects seen as concentric
rings or spirals. Even gradually increasing electrical noise in the
visual cortex can produce the basic elements of an approaching tunnel
of light.
Blackmore's ideas about the personality-altering aspects of NDEs are
more speculative. Given the unusual neurochemistry of the
oxygen-deprived brain, a flood of memories is not too surprising. But
what about patients who say they are judged during the life review, or
who emerge from their NDEs as a changed person? Part of the reason
must be that interpreting an NDE is a long process which begins before
the experience and continues after the patient emerges back into the
ordinary world. Supernatural theories are readily available and
straightforward to understand, plus they accord NDEs a cosmic
significance in proportion to their personal impact. Disentangling
what is a result of religious beliefs in the culture and what is due
to events happening in any dying brain could be next to impossible.
Even so, something special must happen in NDEs for religions to
interpret. Blackmore suggests that as the brain gets closer to death,
our model of self also falls apart, leaving us in a state where there
is experience but no coherent self to experience it. It would be hard
not to be changed after that.
Psychology also helps explain other experiences which suggest a
deathless spirit. For example, when a hypnotized subject is relating
memories of past lives, she is performing the role of someone who has
lived before, and relating what she thinks are appropriate memories.
She fashions this new identity out of common knowledge and stereotypes
about the past, sometimes even fiction she had read long ago and had
seemingly forgotten completely. Remembering past lives under hypnosis
is closely related to experiences of spirit-possession, channelling,
alien abductions, multiple personalities, and hypnotically induced
false memories of ritual abuse. We do not need magic to understand
such experiences.[58]
Mainstream psychology, then, makes progress in understanding unusual
experiences. In contrast, supernatural explanations are dead ends.
Things happen at the whim of spirits, and we are left to make excuses
for the surprising limitations on how the spirit manifests itself. To
make the "survivalist hypothesis" respectable, we at least need
examples of paranormal perception by the soaring spirit. In other
words, we cannot do without public miracles. And then we get the
usual problem: nothing stands out. No one with memories of past lives
comes up with information useful to historians or archaeologists.
When skeptics investigate the story about the hospitalized woman who
saw a shoe on an outside ledge while hovering in an OBE, they find
that she could have easily have obtained her information normally.[59]
Still, what about the direct experiences of spiritual realities that
make OBE or NDE testimonies so compelling? Are we really supposed to
trust psychologists' theories over first-hand experience? Yes. We
rarely realize how much theory and interpretation is woven into our
perceptions---even our biology. For example, we recognize faces with
ease. We _see_ faces, without being aware of the layers of computing
our brain goes through to achieve that effortless identification.
Different neural networks in our brain simultaneously process the
information from our eyes, to identify edges, color, motion and so on.
Parts of our brain are also devoted to identifying features of faces,
and recognizing the overall pattern.[60] This hardwiring is very
useful in everyday life, but it also leads us to see Jesus's face on
tortilla burns. Most of us are willing to admit that is a mistake,
first-hand experience or not. NDEs and OBEs are also permeated by
"theories" wired into our brain structure, and by the folk psychology
we interpret our everyday experience with. These theories are not
infallible; the evidence of psychology is that our folk theories
concerning spirits and first-hand experience are in fact wrong.
This does not mean we understand everything about extraordinary
experiences. Quite the contrary. We know too little about our
brains, or about how our personalities form and change. Something
like an NDE is a messy experience, not always triggered by any single,
clearly identifiable cause like oxygen-deprivation.[61] In physics we
often stumble upon clean and simple explanations; not in psychology.
Humans are extremely complex animals in a complex normal environment.
But we know enough about psychology to see that experiences like NDEs
are not gateways to the supernatural. We have plenty of gaps in our
knowledge---but no gaps we need gods and spirits to bridge.
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Dying to Live
Opinion has long been divided over Near-Death Experiences, or NDEs, some
presenting them as evidence for the existence of the soul and life after death,
others arguing that they are merely the chemical and physiological products
of a dying brain.
Susan Blackmore has interviewed many people who claim to have had NDEs,
and after researching hundreds of case histories she offers an absorbing
and detailed review of this fascinating and controversial phenomenon.
While presenting clear physical explanations for the changes that take
place within the brain, Blackmore argues that true spiritual
transformation comes not from searching after a spirit or soul that
survives death, but from reinterpreting the concept of "self" itself.
Dying to Live succeeds in bridging the gap between the scientific and
the spiritual points of view and shows how an understanding of NDEs can
help us live our lives in the face of death and lead the way to genuine
self- knowledge.
SUSAN BLACKMORE is Senior Lecturer in Psychology at the University of
the West of England. She is a fellow of the Committee for the Scientific
Investigation of Claims of the Paranormal and one of the world's leading
experts on near-death experiences. She is the author of The Adventures
of a Parapsychologist (Prometheus Books), an autobiography describing
her search for evidence of the paranormal.
Table of Contents
Acknowledgements
Preface
1. Coming Close to Death
2. The Stages of Dying
3. Visions From the Dying Brain
4. The Light at the End of the Tunnel
5. Peace, Joy and Bliss
6. But I Saw the Colour of Her Dress
7. Realer Than Real
8. In or Out of the Body?
9. My Whole Life Flashed Before Me
IO. All At Once and Timeless
11. I Decided to Come Back
12. Who Returns?
13. And After Death?
References
Index
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