Mind and Research
Near-Death Experiences: What Researchers Have Actually Found
Some people who come close to death, or who are briefly clinically dead and then resuscitated, later describe vivid experiences: a sense of peace, leaving the body, moving through darkness toward light, meeting deceased relatives, or reviewing their lives. These accounts have been reported for a long time, but they became a subject of organized research only in the last half century. What follows is a summary of what that research has found, where it is solid, where it is contested, and where the evidence simply runs out.
How the Field Began
The modern conversation started in 1975, when the physician and philosopher Raymond Moody published Life After Life. Moody collected accounts from people who had survived close brushes with death and noticed recurring elements across them. He also popularized the term "near-death experience," now usually shortened to NDE. The book was a bestseller and drew wide public interest.
Moody's work was a collection of interviews, not a controlled study, and he said as much. Its value was in describing a pattern that others could then investigate more carefully. In the years that followed, researchers including the psychologist Kenneth Ring and the cardiologist Michael Sabom began more systematic work, and the International Association for Near-Death Studies was founded to support research in the area.
Measuring the Experience
One problem early researchers faced was definition. If anyone who felt something unusual near death counted as having an NDE, comparisons between studies would be meaningless. The psychiatrist Bruce Greyson, who spent much of his career at the University of Virginia, addressed this in 1983 by publishing the Near-Death Experience Scale, often called the Greyson NDE Scale.
The scale is a questionnaire covering several kinds of features: changes in thinking, such as time seeming to speed up or slow down; emotional features, such as intense peace or joy; apparently paranormal features, such as feeling separated from the body; and transcendental features, such as encountering a mystical presence or an unearthly realm. Answers are scored, and a person above a set threshold is classified as having had an NDE. The scale gave the field a shared yardstick, and it remains widely used.
The Prospective Studies
Early research relied on people who came forward with stories, which risks collecting only the most dramatic or memorable cases. A stronger design is prospective: follow all patients who go through a defined medical event, such as cardiac arrest, and interview them afterward whether or not they report anything.
The best known study of this kind was led by the Dutch cardiologist Pim van Lommel and published in The Lancet in 2001. The team interviewed 344 patients who had been successfully resuscitated after cardiac arrest in Dutch hospitals. Around 18 percent reported some recollection that qualified as an NDE, and a smaller share reported a deep experience. The researchers found that medical factors they measured, such as the duration of unconsciousness or the medications given, did not clearly explain who had an NDE and who did not. They also followed up with survivors years later and reported lasting changes in attitudes among those who had experiences.
Two points are worth keeping in mind. First, most resuscitated patients in the study did not report an NDE, so the experience is common but far from universal. Second, a finding that measured factors did not explain NDEs is not the same as proof that no physical factor could. It means the explanation was not found in the variables recorded.
The Question of Seeing From Outside the Body
The most debated claim in this field is that people have perceived real events, such as conversations or procedures in the room, while they appeared to be unconscious, sometimes from a viewpoint above their bodies. If true and verified, this would be hard to fit into standard accounts of brain function.
To test it directly, the critical care physician Sam Parnia and colleagues ran the AWARE study, published in 2014. Images were placed on high shelves in resuscitation areas, visible only from above. The idea was that a patient who genuinely saw the room from the ceiling might report the image. In practice, few cardiac arrests happened in rooms with shelves, few survivors were able to be interviewed, and no patient identified a hidden image. The study did report one patient who described auditory details of his resuscitation that appeared to match the timing of events, which supporters found intriguing and skeptics considered weak evidence on its own.
So the honest status of veridical out of body perception is this: there are anecdotal reports that some researchers find compelling, and there is so far no controlled study that has confirmed it.
Proposed Explanations
Researchers have offered several physical explanations, each of which accounts for some features and struggles with others. Some experiencers describe the events around their NDE as a chain of meaningful coincidences, a pattern Carl Jung called synchronicity, though that framing is interpretation rather than evidence.
- Oxygen deprivation and carbon dioxide changes can produce visual disturbances and altered states, though NDEs are also reported in situations without these conditions.
- REM intrusion, the blending of dream sleep into waking, has been proposed by the neurologist Kevin Nelson as a contributing factor in some people.
- Drug effects: the anesthetic ketamine can produce experiences with some NDE features, such as feeling detached from the body.
- A final surge of brain activity: animal studies, including work from Jimo Borjigin's laboratory at the University of Michigan, have recorded bursts of organized brain activity in the moments after the heart stops, suggesting the dying brain may not simply go quiet.
- Expectation and culture: the content of NDEs varies by culture and personal belief, which suggests that at least the interpretation, and perhaps some of the imagery, is shaped by the person's background.
On the other side, some researchers, including van Lommel and Greyson, have argued that the clarity of NDEs during periods of severely impaired brain function poses a real challenge to the view that the brain produces consciousness. This is a serious position held by credentialed researchers. It is also a minority position in neuroscience, and the debate is unresolved.
What Is Well Supported
Setting aside the question of what NDEs ultimately mean, several findings are consistent across studies. NDEs occur in a meaningful minority of people who survive close calls with death. They are often described as more real than ordinary life. They can include distressing experiences, not only peaceful ones, a fact that sometimes gets left out of popular accounts. And many people report lasting changes afterward, often including less fear of death and a stronger sense of meaning or compassion. Those aftereffects are themselves a legitimate subject of study regardless of what caused the experience.
Near-death research overlaps with other attempts to study the edges of the self. Ian Stevenson's reincarnation case studies at the University of Virginia raised related questions about memory surviving the body, and the field drew similar debates over method. Many people who have had an NDE also report changes in their spiritual outlook, which is part of why the topic appears so often in discussions of spiritual science.
A Practical Takeaway
If you or someone close to you has had an NDE, the research offers one clear lesson: these experiences are common enough to be normal, and the people who have them are not imagining things in any careless sense. They deserve to be listened to without ridicule and without pressure to adopt anyone's interpretation. If you are simply curious, hold two things at once. The experiences are real as experiences and often life changing. Whether they show that consciousness continues beyond the body is a question the evidence has not yet answered, and anyone who tells you otherwise, in either direction, is claiming more than the research supports.
Sources and further reading
- Near-death experience (Wikipedia)
- Raymond Moody (Wikipedia)