Near-Death Experience

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Some of the people pulled back from cardiac arrest return with a report, and the reports rhyme. Pain gives way to peace. The person seems to leave the body and watch the resuscitation from above. There is darkness, often read as a tunnel; a light; sometimes the dead, familiar and waiting; sometimes the whole of a life replayed at once; a border that cannot be crossed; then return, not always welcomed. Most people who nearly die report nothing at all. A persistent minority — roughly ten to twenty percent of those who come close — return with this, and a Gallup-derived estimate in the early 1980s, putting the rate near four percent of the population, set the count on the order of nine million Americans then living. The experience is uncommon enough to be rare and common enough to be a fact of human life, and it has the same architecture whether it surfaces in a Dutch coronary ward, a Northumbrian deathbed in the eighth century, or the closing pages of Plato’s Republic.

The phenomenon is older than its name. Pierre-Jean du Monchaux, an eighteenth-century French military physician, recorded a case in his Anecdotes de Médecine — a Paris apothecary who fainted after a heavy bloodletting, lost all outward sensation, and saw a light so pure he took it for heaven — and guessed at an influx of blood to the brain. The Swiss geologist Albert Heim, who had himself fallen while climbing, gathered accounts from fellow mountaineers and laborers who had plummeted from heights and published them in 1892 as Notizen über den Tod durch Absturz, the first description of the event as a clinical syndrome: time slowing, calm replacing terror, a panorama of the life unrolling in the seconds of the fall. Out of the debate Heim’s notes provoked, the philosopher Victor Egger proposed in 1896 the French expérience de mort imminente, the experience of imminent death. The modern field begins in 1975, when the psychiatrist Raymond Moody published Life After Life, coined the phrase “near-death experience,” and distilled roughly one hundred fifty accounts into about fifteen recurring elements — ineffability, the rush of peace, the dark tunnel, the sense of leaving the body, the meeting with others, the being of light, the panoramic review, the border or point of no return, the reluctant return among them — while insisting that no single account contains them all. Kenneth Ring condensed the list into a five-stage sequence: peace, separation from the body, entering darkness, seeing the light, entering another realm.

Measuring the patterned thing

Measurement followed the naming. In 1983 Bruce Greyson reduced an eighty-item pool of reported features to a sixteen-item scale that proved reliable, internally consistent, and able to separate clear cases from doubtful ones; it sorts its items into cognitive, affective, paranormal, and transcendental clusters and has become the field’s standard instrument, the NDE Scale used across the cardiac-arrest studies that came after. It carries a standing objection. Its items are loose enough — mystical feeling, a sense of an unearthly place — that experiences nowhere near death can score as near-death experiences, because the scale was built without a precise definition of near death against which to anchor itself. A 2022 multidisciplinary consensus, convened around Sam Parnia and joined by Greyson among others, proposed tightening the whole enterprise: retiring the term in favor of “recalled experience of death,” fixing it to a recurrent narrative arc, and excluding dreams, the lucidity sometimes induced by chest compressions, and drug and delirium states from the definition. The proposal drew its own sharp reply — that ruling out adjacent phenomena by fiat risks sawing off the branch the field sits on. However the boundary is drawn, the thing keeps being found: across eleven prospective cardiac-arrest studies, between roughly six and thirty-nine percent of interviewed survivors report it, the spread tracking how and when the interviews are done more than anything in the patients.

The decisive methodological turn was to stop waiting for stories. Volunteered accounts arrive years after the event, polished by retelling and selected for their drama; the prospective design interviews every cardiac-arrest survivor in a hospital system before the story can season. In 2001 Pim van Lommel and colleagues reported in The Lancet on 344 consecutive resuscitated patients in ten Dutch hospitals. Eighteen percent described a near-death experience, twelve percent a deep “core” experience — and occurrence tracked none of the things a straightforward dying-brain artifact should track. Not the duration of the arrest, whether two minutes or eight. Not the duration of unconsciousness, whether five minutes or three weeks in a coma. Not the degree of oxygen deprivation, not the medications given, not prior fear of death, not foreknowledge of the phenomenon, not gender, religion, or education. The authors pressed the negative result into an argument: if oxygen starvation alone produced the experience, most of their clinically dead patients should have reported one, and only a minority did. The same year Parnia’s pilot at Southampton found the one physiological difference it could measure pointing the wrong way — higher oxygen pressure in the group that reported experiences — and introduced what became the field’s signature test: targets hidden up high, legible only to a viewer somehow looking down from outside the body. None were identified.

The AWARE study, reported in 2014, scaled the method across fifteen hospitals in three countries: 2,060 cardiac arrests, 140 survivors interviewed, with about forty-six percent retaining some memory of the interval, about nine percent meeting near-death criteria and roughly two percent describing actual sights and sounds of their resuscitation. One case stood out — a man who accurately recounted events from a period when, on every conventional measure, his brain should have been incapable of forming memories. Shelves bearing images visible only from above had been installed in advance precisely to catch such perception; the patients who reported awareness had arrested in rooms that held none. That detail is the field in miniature: the experience is uncommon, survival is uncommon, and the testable case is the rarest event of all. AWARE-II, published in Resuscitation in 2023, put electroencephalography and cerebral oximetry on the resuscitation interval itself. Of 567 in-hospital arrests, 53 patients survived, 28 could be interviewed, eleven reported memories or perceptions suggesting consciousness, and six described the full transcendent arc the consensus statement calls a recalled experience of death. The unanticipated finding was electrical: in some patients, near-normal EEG rhythms of the kind associated with conscious processing — delta, theta, alpha, beta — emerging as late as thirty-five to sixty minutes into resuscitation in brains under severe oxygen debt. Whatever the dying brain is doing, it is not simply switching off.

The explanatory contest

Explanations exist in quantity, and the contest among them is the live edge of the field. The oxygen-starvation hypothesis leans on an analogy with pilots who black out under acceleration in a centrifuge — the syndrome of G-induced loss of consciousness produces tunnel vision, bright lights, a floating sensation, and brief vivid dream-like fragments that the test pilot James Whinnery described in centrifuge subjects. But those episodes lack the panoramic life review and the durable transformation that follow the classic near-death case, and the prospective findings cut against simple anoxia: if too little oxygen were the cause, the experience should track how little there was, and it does not. Kevin Nelson’s group reported in 2006 that people who report near-death experiences are markedly more prone to sleep paralysis and to sleep-related visual and auditory hallucinations, evidence they read as REM intrusion — fragments of the dreaming state breaking into waking arousal — though that is a correlation rather than a demonstrated mechanism, and Greyson has noted that the arrow could run the other way.

Stimulating the temporal-parietal junction can produce the out-of-body component on demand: Olaf Blanke’s 2002 report described an epilepsy patient in whom focal current to the right angular gyrus repeatedly induced the sense of floating above the body — the same finding that anchors the out-of-body experience as a model the brain assembles and can be made to revise. The induced versions, though, are fragmentary — half-bodies, doublings, displacements of a limb — and lack the narrative coherence of the spontaneous case. On the chemical side, Charlotte Martial and colleagues compared 625 near-death narratives against some fifteen thousand drug reports in 2019 using a measure of semantic similarity and found the dissociative anesthetic ketamine, an NMDA-receptor antagonist, the closest match, with Salvia divinorum and the serotonergic psychedelics — DMT among them — behind it; the result has been taken to support the idea that an endogenous NMDA antagonist is released near death, and the 2022 guidelines answer that drug states reliably contain what the classic cases reliably lack, distorted body schema and idiosyncratic imagery. And then there is the gamma surge. In 2013 Jimo Borjigin’s team recorded, in rats, a burst of coherent gamma activity in the half-minute after cardiac arrest that exceeded the waking state, with sharply increased front-to-back connectivity; in 2023 Gang Xu and colleagues found a comparable surge in two of four dying comatose patients after ventilatory support was withdrawn, centered on the posterior cortical “hot zone” implicated in conscious experience. The dying brain, on this evidence, mounts a final electrical event of exactly the kind a vivid conscious episode would require. Whether that surge is the experience, rather than merely permitting it, is what no measurement has yet shown.

The sharpest dispute concerns perception — whether anything is actually seen from the reported vantage outside the body. Researchers sympathetic to the experiencers, among them Greyson, Parnia, and van Lommel, cite patients who described their resuscitations accurately from above, sometimes with staff corroboration. The designed test has come up empty: across the five prospective studies that installed hidden targets, the twelve patients who reported leaving their bodies described none of them. The emblematic single case is Pam Reynolds, operated on in 1991 at the Barrow Neurological Institute in Phoenix for a giant basilar aneurysm, her body cooled toward sixty degrees Fahrenheit, her heart stopped, the blood drained from her head, her eyes taped shut, her ears sealed by molded earphones emitting loud clicks to confirm a flat brainstem response. She reported watching the surgery, likened the bone saw to an electric toothbrush, and recounted overheard remarks about the size of her vessels. The cardiologist Michael Sabom presented the case as perception during a silenced brain. Critics — the philosopher Keith Augustine, the anesthesiologist Gerald Woerlee — reply that the perceptual portion most plausibly occurred under ordinary general anesthesia, with anesthesia awareness and sound conducted through the skull, hours before the circulatory standstill on which the whole claim depends. The case has held in that posture for three decades: cited constantly, verified never. The wider camps are at least candid about what they hold. Dean Mobbs and Caroline Watt titled their 2011 review “There is nothing paranormal about near-death experiences” — normal brain function gone awry under trauma. Survivalist researchers hold that the experiences show consciousness is not extinguished when the brain fails, a claim the skeptic Chris French and others call unfalsifiable. The evidence to hand decides for neither.

What is least disputed: the aftermath

What is least disputed is what the experience does to those who have it. Ring documented a consistent cluster of changes in those who return: a heightened appreciation for life, more compassion, less appetite for material wealth, and a sharply reduced fear of death — people becoming more spiritual, often without becoming more religious. The pattern shows up in controlled comparison. In a 2003 study of psychiatric outpatients, the patients who had come close to death and reported a near-death experience scored lower on every measure of psychological distress than the patients who had come equally close and reported nothing; the rate of experiences among them matched the general population, suggesting the phenomenon is not a symptom of disorder and may instead blunt its edge. Not every aftereffect is benign. Greyson also documented integration difficulties serious enough that the DSM-IV category of “religious or spiritual problem” was proposed partly with these experiencers in mind, and a minority of the experiences themselves are frightening rather than radiant — a void, a sense of judgment, a hellish landscape. The clinical posture that emerged is a kind of professional modesty: listen, do not judge, help the person make sense of what happened.

The cultural dimension is the deepest complication. By one survey of the record up to 2005, the great majority of world cultures preserve some account of the experience — but the contents vary with the culture that holds them. Cross-cultural work finds a shared skeleton wearing different flesh: the light identified as angels or deceased kin in American accounts, as messengers of the god of death in Hindu ones, with the interpretation tracking language, religion, and education. Allan Kellehear pressed the point harder, arguing that the tunnel and the life review — two of the elements biological theories most want to explain — appear largely confined to societies shaped by literate, historic religions; people in hunter-gatherer and herding societies who come back from the edge report otherworld journeys without reviewing their lives. A biology of those elements, on his reading, may rest on a local sample. Surveying the ancient record, Gregory Shushan notes the awkward fact that its apparent universality has been enlisted for survivalist and materialist conclusions alike, while the descriptions themselves diverge in detail — the same record read by both camps as proof.

An old shape

The modern near-death experience has an old shape. Separation from the body, passage through darkness toward light, the accounting of a life, the reluctant return — this is the otherworld journey, a narrative genre with a documented history reaching back through the literate religions and beyond them. [Plato] (/encyclopedia/plato) closes the Republic with the Myth of Er: a soldier slain in battle who revives on his funeral pyre on the twelfth day and reports what the souls undergo between lives — the seat of judgment, the spindle of Necessity, the choice of the next life, the river of forgetting drunk on the plain of Lethe. The Tibetan delog are recorded as dying, traveling the afterlife realms, and returning with teachings for the living; medieval Christendom produced a whole literature of visionary return, the most exact of which is Bede’s account, in his Ecclesiastical History, of the Northumbrian householder Drythelm, who dies of illness, revives at dawn, and describes a guided tour of a valley of flame and ice and a stinking pit of fire before turning his life to penance. Carol Zaleski set these medieval journeys beside the modern reports in Otherworld Journeys and argued they form one tradition shaped by its tellers. And the soul’s ascent through the heavenly spheres, which the laboratory’s tunnel toward light abbreviates, is charted in the Corpus Hermeticum: the Poemandres describes the soul stripping away, at each celestial gate, the accretion it took on in descent, until it stands at the threshold of the divine and is itself made into power. Read against the esoteric architecture of the soul — the layered self of the Hermetic, Neoplatonic, and Kabbalistic traditions, in which the parts of the person separate at death along a known order — the near-death report is not a stray anomaly but a fragment of a well-mapped country.

Two readings of that inheritance have always run in parallel, and the laboratory has handed each of them new evidence without deciding between them. A story this old and this widespread may be old and widespread because the experience keeps occurring, the genre a sediment laid down by a real event that bodies keep having. Or the content that varies with culture is exactly what a transmitted genre would produce, the experience furnished from the storehouse of whatever afterlife its subject was raised inside. The recurrence across millennia is the survivalist’s evidence; the divergence in detail is the constructivist’s, and both draw from the same record. Within the older tradition the question hardly arises, because the journey was never a problem to be explained away: it was the soul doing, under duress, what contemplation and the mysteries trained it to do deliberately, leaving the body and returning with knowledge. The mystics of the ascent traditions described a graded path toward the light; the dying are reported to take it at a single stride.

Fifty years of measurement have left the field in an unusual posture. The experience itself is past serious doubt — patterned, prevalent, consequential, and identifiable by instruments built for the purpose. Its cause is contested across half a dozen incompatible accounts, none of them established. Between those two facts stands a small population of people who were, for an interval, clinically dead, and who came back saying the interval was not empty — and an older tradition that would have expected nothing else.

Scholarship and the clinical record

The near-death experience is among the most heavily studied of altered states, and its literature spans clinical phenomenology, prospective hospital research, neurophysiology, and the comparative study of afterlife traditions.

• Raymond A. Moody Jr., Life After Life (Atlanta: Mockingbird Books, 1975). The book that named the phenomenon and fixed its phenomenological template; Moody’s roughly fifteen recurring elements remain the descriptive vocabulary of the field. Overview at https://en.wikipedia.org/wiki/Life_After_Life_(Moody_book).

• Bruce Greyson, “The near-death experience scale: construction, reliability, and validity,” Journal of Nervous and Mental Disease 171, no. 6 (1983): 369–375. The sixteen-item instrument that made the experience quantifiable and the standard against which later studies report. https://pubmed.ncbi.nlm.nih.gov/6854303/

• Pim van Lommel, Ruud van Wees, Vincent Meyers, and Ingrid Elfferich, “Near-death experience in survivors of cardiac arrest: a prospective study in the Netherlands,” The Lancet 358, no. 9298 (2001): 2039–2045. The first large prospective study, and the source of the finding that occurrence does not track the physiological severity of the arrest. https://www.thelancet.com/journals/lancet/article/PIIS0140673601071008/fulltext

• Bruce Greyson, “Near-death experiences in a psychiatric outpatient clinic population,” Psychiatric Services 54, no. 12 (2003): 1649–1651. Found that among patients who had come close to death, those reporting a near-death experience scored lower on every measure of psychological distress. https://pubmed.ncbi.nlm.nih.gov/14645808/

• Kevin R. Nelson, Michelle Mattingly, Sherman A. Lee, and Frederick A. Schmitt, “Does the arousal system contribute to near death experience?” Neurology 66, no. 7 (2006): 1003–1009. The REM-intrusion correlation, tying near-death reporters to sleep paralysis and sleep-related hallucination. https://pubmed.ncbi.nlm.nih.gov/16606911/

• Dean Mobbs and Caroline Watt, “There is nothing paranormal about near-death experiences: how neuroscience can explain seeing bright lights, meeting the dead, or being convinced you are one of them,” Trends in Cognitive Sciences 15, no. 10 (2011): 447–449. The compact statement of the brain-only reading. https://pubmed.ncbi.nlm.nih.gov/21852181/

• Jimo Borjigin et al., “Surge of neurophysiological coherence and connectivity in the dying brain,” Proceedings of the National Academy of Sciences 110, no. 35 (2013): 14432–14437. The rat gamma surge that showed the dying brain can briefly exceed the waking state in coherent high-frequency activity. https://www.pnas.org/doi/10.1073/pnas.1308285110

• Sam Parnia et al., “AWARE—AWAreness during REsuscitation—a prospective study,” Resuscitation 85, no. 12 (2014): 1799–1805. The multi-center trial with hidden visual targets and the single case of apparently veridical awareness in a room without a target. https://www.resuscitationjournal.com/article/S0300-9572(14)00739-4/abstract

• Charlotte Martial et al., “Neurochemical models of near-death experiences: a large-scale study based on the semantic similarity of written reports,” Consciousness and Cognition 69 (2019): 52–69. The text-mining comparison that placed ketamine closest to the near-death narrative among psychoactive drugs. https://www.sciencedirect.com/science/article/abs/pii/S105381001830535X

• Sam Parnia et al., “Guidelines and standards for the study of death and recalled experiences of death — a multidisciplinary consensus statement and proposed future directions,” Annals of the New York Academy of Sciences 1511, no. 1 (2022): 5–21. The proposal to retire the term in favor of “recalled experience of death” and to fix a definition. https://nyaspubs.onlinelibrary.wiley.com/doi/10.1111/nyas.14740

• Gang Xu et al., “Surge of neurophysiological coupling and connectivity of gamma oscillations in the dying human brain,” Proceedings of the National Academy of Sciences 120, no. 19 (2023): e2216268120. The human counterpart to the rat gamma surge, in the posterior cortical “hot zone.” https://www.pnas.org/doi/10.1073/pnas.2216268120

• Sam Parnia et al., “AWAreness during REsuscitation — II: a multi-center study of consciousness and awareness in cardiac arrest,” Resuscitation 191 (2023): 109903. The study that measured EEG during compressions and found near-normal rhythms emerging deep into resuscitation. https://pubmed.ncbi.nlm.nih.gov/37423492/

On the comparative and historical side, Carol Zaleski’s Otherworld Journeys: Accounts of Near-Death Experience in Medieval and Modern Times (New York: Oxford University Press, 1987) is the indispensable bridge between the medieval visionary literature and the modern reports; Allan Kellehear’s Experiences Near Death: Beyond Medicine and Religion (New York: Oxford University Press, 1996) is the controlling cross-cultural treatment; and Gregory Shushan’s Conceptions of the Afterlife in Early Civilizations (London: Continuum, 2009) sets the experience against the afterlife conceptions of five ancient civilizations. The Myth of Er closes Book X of Plato’s Republic, and the soul’s graded ascent through the spheres is set out in the Poemandres, the first treatise of the Corpus Hermeticum, hosted in the Library.

→ In the library: Corpus Hermeticum I — Poemandres (Mead translation)

→ Related: Mysticism · Psilocybin Research · Out Of Body Experience · Reincarnation Research · Soul · Plato · Hermes Trismegistus