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NDE & OBE

A curated collection of research papers focusing on nde & obe. Explore the methodology, key findings, and ongoing debates in this field.

Total Papers 41

Year Range 1977 – 2025

Top Contributors

Greyson, BruceMartial, CharlotteLaureys, Steven

Recent Publications

The Central Clinical Relevance of Near-Death Experiences in Acute Care Contexts

Michael, Pascal; Fritz, Pauline; Gosseries, Olivia; Rousseau, Anne-Françoise; Ancion, Aurore; Ghuysen, Alexandre; Martial, Charlotte • 2025 • Frontiers in Psychology

Perspective article arguing that near-death experiences warrant systematic identification and management in emergency and intensive care settings. Reviews NDE incidence data (approximately 20% of cardiac arrest survivors, 15% of ICU survivors, and possibly 58-64% of pediatric survivors) and discusses enduring psychological impacts including reduced death anxiety, increased meaning, and post-traumatic growth, while noting that at least 14% of NDEs are distressing. Proposes incorporating NDE screening via the NDE-C scale into clinical care plans, differentiating NDEs from delirium, and attending to set-and-setting factors that may modulate NDE valence. Draws parallels with psychedelic experiences and discusses pharmacological concerns around sedation suppressing potentially beneficial NDE recall.

#nde #clinical_relevance #emergency_medicine #intensive_care #psychedelic_comparison

Explanation of Near-Death Experiences: A Systematic Analysis of Case Reports and Qualitative Research

Hashemi, Amirhossein; Oroojan, Ali Akbar; Rassouli, Maryam; Ashrafizadeh, Hadis • 2023 • Frontiers in Psychology

Systematic analysis of 54 studies (27 case reports, 20 case series, 7 qualitative studies) spanning 1980-2022, involving 465 NDErs across multiple cultures and religions. Screened 2,407 initial records from PubMed, Scopus, EMBASE, CINAHL, and Google Scholar using PRISMA-P guidelines and JBI quality appraisal. NDEs were categorized into 4 main categories with 19 subcategories: emotional, cognitive, spiritual/religious, and supernatural experiences. Supernatural experiences—especially out-of-body experiences (35/54 studies) and heightened senses (39/54 studies)—were the most frequently reported. A universal phenomenological core (OBEs, tunnel passage, heightened senses, life review) was found across all cultures, with cultural variation confined to interpretation rather than experiential structure.

#case_reports #cross_cultural #out_of_body_experience #qualitative_synthesis #systematic_review

Neuro-Functional Modeling of Near-Death Experiences in Contexts of Altered States of Consciousness

Romand, Raymond; Ehret, Günter • 2023 • Frontiers in Psychology

Neuro-functional models of near-death experiences (NDEs) are evaluated to determine whether NDEs can be explained as brain-based phenomena occurring during altered states of consciousness (ASCs). Evidence is drawn from drug effects (ketamine, DMT), epileptic seizures, electrical brain stimulation, anesthetic awareness, and ischemic stress, including ~1,000 fighter pilot G-LOC episodes recorded across 16 years. A large overlap was found between NDE themes from original reports and those induced experimentally. Out-of-body experiences can be localized to the temporo-parietal junction (TPJ). The models collectively suggest NDEs emerge as hallucination-like phenomena from brains in ASCs.

#altered_states_of_consciousness #temporo_parietal_junction #g_loc_fighter_pilots #neurofunctional_models #out_of_body_experience

AWAreness during REsuscitation - II: A Multi-Center Study of Consciousness and Awareness in Cardiac Arrest

Parnia, Sam; Keshavarz Shirazi, Tara; Patel, Jignesh; Tran, Linh; Sinha, Niraj; O'Neill, Caitlin; Roellke, Emma; Mengotto, Amanda; Findlay, Shannon; McBrine, Michael; Spiegel, Rebecca; Tarpey, Thaddeus; Huppert, Elise; Jaffe, Ian; Gonzales, Anelly M; Xu, Jing; Koopman, Emmeline; Perkins, Gavin D; Vuylsteke, Alain; Bloom, Benjamin M; Jarman, Heather; Tong, Hiu Nam; Chan, Louisa; Lyaker, Michael; Thomas, Matthew; Velchev, Veselin; Cairns, Charles B; Sharma, Rahul; Kulstad, Erik; Scherer, Elizabeth; O'Keeffe, Terence; Foroozesh, Mahtab; Abe, Olumayowa; Ogedegbe, Chinwe; Girgis, Amira; Pradhan, Deepak; Deakin, Charles D • 2023 • Resuscitation

Cognitive activity during cardiac arrest (CA) was examined in a prospective 25-site study across US and UK hospitals (May 2017-March 2020). Independent audiovisual awareness testing and continuous real-time EEG and cerebral oxygenation (rSO2) monitoring were incorporated into CPR during in-hospital CA. Of 567 IHCA, 53 survived (9.3%); 28 completed interviews and 11 (39.3%) reported memories suggestive of consciousness. Four experience categories emerged: CPR-induced consciousness (7.1%), post-resuscitation awareness (7.1%), dream-like states (10.7%), and transcendent recalled experiences of death (21.4%). Despite marked cerebral ischemia (mean rSO2=43%), normal EEG activity (delta, theta, alpha) consistent with consciousness emerged 35-60 minutes into CPR. No survivor identified hidden visual targets; one showed inconclusive implicit auditory recall.

#cardiac_arrest_awareness #eeg_during_cpr #recalled_experience_of_death #audiovisual_awareness_testing #cerebral_oxygenation

Which Near-Death Experience Features Are Associated with Reduced Fear of Death?

Pehlivanova, Marieta; Carroll, Ashley; Greyson, Bruce • 2022 • Mortality

This correlational study examined associations between 16 specific near-death experience (NDE) features and five death attitude variables in the largest-to-date sample of NDE reporters (N = 384 NDErs from 422 total participants). Using Spearman correlations with Bonferroni correction (p < 0.003), encountering mystical beings and undergoing a life review emerged as the strongest predictors of reduced Fear of Death (rho ≈ -0.22). Cosmic unity and mystical beings predicted lower Death Anxiety. Approach acceptance was predicted by joy, bright light, mystical beings, and encounters with deceased persons. Contrary to theoretical predictions, out-of-body disembodiment was not associated with reduced fear of death. NDErs showed markedly lower fear of death and higher approach acceptance than non-NDErs and normative samples. Findings have implications for end-of-life interventions and challenge Terror Management Theory assumptions.

#near_death_experiences #fear_of_death #death_anxiety #nde_aftereffects #terror_management_theory

Advancing the Evidence for Survival of Consciousness

Delorme, Arnaud; Radin, Dean; Wahbeh, Helané • 2021 • Bigelow Institute for Consciousness Studies (BICS) Essay Contest

Adapts a medical evidence-grading framework (A–F) to evaluate nine categories of survival-of-consciousness evidence. Mental and physical mediumship received the highest grades (B+); reincarnation and NDE OBE aspects received B−; EVP/ITC and deathbed visions received C+; apparitions, induced experiences, and ADCs received C. No category achieved grade A, primarily because the psi-vs-survival interpretive confound cannot be resolved with current methods. Proposes ten new experiments and surveys 422 academics: controlled veridical OBEs during NDEs ranked most persuasive (mean 14.4/50), followed by mediumship (9.6) and reincarnation (9.0). A worldwide belief survey (N=2,389) finds the commonly cited 60–70% survival belief rate overstates identity-preserving (Level 2+) belief, which is closer to 40–50%.

#survival_of_consciousness #mediumship #near_death_experience #reincarnation #evidence_grading

The Mystical Experience and Its Neural Correlates

Woollacott, Marjorie; Shumway-Cook, Anne • 2020 • Journal of Near-Death Studies

Narrative review comparing three types of spiritually transformative experiences — near-death experiences, psilocybin experiences, and meditative experiences of cosmic consciousness — across phenomenology, transformative aftereffects, and neural correlates. Case studies show all three share Stace's core mystical attributes (unity, sacredness, noetic quality). Neuroimaging reveals significant Default Mode Network deactivation during meditation and psilocybin ingestion, with flatlined EEG during cardiac arrest NDEs. Proposes a filter/reducing valve theory: when DMN activity is reduced or eliminated, expanded consciousness becomes accessible.

#mystical_experience #default_mode_network #filter_theory #nde_neural_correlates #psilocybin

The Near-Death Experience Content (NDE-C) scale: Development and psychometric validation

Martial, Charlotte; Simon, Jessica; Puttaert, Ninon; Gosseries, Olivia; Charland-Verville, Vanessa; Nyssen, Anne-Sophie; Greyson, Bruce; Laureys, Steven; Cassol, Héléna • 2020 • Consciousness and Cognition

Interest in near-death experiences (NDEs) has grown rapidly but the standard measurement tool — Greyson's (1983) NDE scale — shows several psychometric weaknesses. Across three studies with 564 French-speaking participants, a new 20-item Near-Death Experience Content (NDE-C) scale was developed and validated. Study 1 (N=403) identified structural weaknesses in the Greyson scale's factor structure. Study 2 (N=161) established the NDE-C scale's 5-factor structure (Beyond the Usual, Harmony, Insight, Border, Gateway) with Cronbach's α=0.85 and concurrent validity correlations above 0.76. Study 3 showed the scale discriminates NDEs from drug-induced, meditation, and trance experiences, with Border and Gateway factors being most distinctive. A cut-off score of ≥27/80 is proposed for research use.

#nde_measurement #psychometric_validation #scale_development #nde_phenomenology #factor_analysis

A systematic analysis of distressing near-death experience accounts

Cassol, Helena; Martial, Charlotte; Annen, Jitka; Martens, Géraldine; Charland-Verville, Vanessa; Majerus, Steve; Laureys, Steven • 2019 • Memory

Investigated the prevalence, classification, and phenomenology of distressing near-death experiences in 123 NDErs recruited through the Coma Science Group (Liège). Using the Greyson NDE Scale and Memory Characteristics Questionnaire, 17 experiences (14%) were classified as distressing — higher than the 1–10% reported previously. Multiple coders categorized these into 8 inverse, 8 hellish, and 1 void accounts, confirming Greyson and Bush's (1992) taxonomy with high inter-rater reliability (kappa = 0.855–1.0). Suicide survivors were overrepresented among distressing NDErs (24% vs. 1%, p < .001). Bayesian analyses showed decisive evidence for lower affective scores (BF₁₀ = 42.3) but no differences on cognitive, paranormal, or transcendental components. Memories were equally vivid and detailed as classical NDEs.

#distressing_nde #nde_phenomenology #memory_characteristics #greyson_nde_scale #bayesian_statistics

Qualitative thematic analysis of the phenomenology of near-death experiences

Cassol, Helena; Pétré, Benoît; Degrange, Sophie; Martial, Charlotte; Charland-Verville, Vanessa; Lallier, François; Bragard, Isabelle; Guillaume, Michèle; Laureys, Steven • 2018 • PLOS ONE

Qualitative thematic analysis of 34 cardiac arrest survivors' NDE narratives using NVivo software and Braun & Clarke methodology. Two independent coders (Cohen's kappa = 0.73) identified 11 themes: 10 'time-bounded' (Light 74%, Return 56%, Meeting 44%, Hyperlucidity 41%, Description of scenes 41%, Darkness 38%, OBE 35%, Awareness of death 26%, Life events 24%, Entrance 18%) and 1 'transversal' (Altered time perception 47%). Seven themes match Greyson NDE Scale features; three additional themes (Entrance, Return, Description of scenes) are not formally captured by existing questionnaires. Supports NDEs as 'universal human experiences' with consistent phenomenological structure.

#thematic_analysis #phenomenology #cardiac_arrest #greyson_scale #qualitative_methods

DMT Models the Near-Death Experience

Timmermann, Christopher; Roseman, Leor; Williams, Luke; Erritzoe, David; Martial, Charlotte; Cassol, Héléna; Laureys, Steven; Nutt, David; Carhart-Harris, Robin • 2018 • Frontiers in Psychology

Intravenous DMT (7–20 mg) was administered to 13 healthy volunteers in a within-subjects, placebo-controlled, single-blind study to test whether the psychedelic experience overlaps phenomenologically with near-death experiences (NDEs). Using the Greyson NDE scale as the primary outcome, all 13 participants scored above the NDE threshold (≥7) after DMT, with a massive effect (t = 10.91, p = 1.39×10⁻⁷, d = 3.09). Ten of 16 NDE items reached significance after correction. Comparison with a matched sample of 13 actual NDE experiencers revealed comparable total scores (d = 0.49, p = 0.089), with only 'point of no return' differing significantly. NDE scores correlated strongly with ego dissolution (r = 0.69) and mystical experience (r = 0.90). Baseline delusional ideation predicted NDE intensity. These results demonstrate striking phenomenological overlap between DMT experiences and actual NDEs.

#dmt #psychedelic #near_death_experience #phenomenology #ego_dissolution

Intensity and Memory Characteristics of Near-Death Experiences

Martial, Charlotte; Charland-Verville, Vanessa; Cassol, Héléna; Didone, Vincent; Van Der Linden, Martial; Laureys, Steven • 2017 • Consciousness and Cognition

Examined whether NDE intensity correlates with phenomenological memory characteristics in 152 individuals with classical NDEs (Greyson scale ≥7/32). Participants completed the Greyson NDE scale and Memory Characteristics Questionnaire (MCQ). Greyson total score positively correlated with MCQ total score (r=0.29, p<0.0005), indicating more intense NDEs have richer memory phenomenology. Specific associations found for sensory details, personal importance, and reactivation frequency. No associations with time since NDE, suggesting memory characteristics remain stable over time (mean 23 years).

#memory_characteristics #greyson_scale #mcq #phenomenology #retrospective_survey

Temporality of Features in Near-Death Experience Narratives

Martial, Charlotte; Cassol, Helena; Antonopoulos, Georgios; Charlier, Thomas; Heros, Julien; Donneau, Anne-Francoise; Charland-Verville, Vanessa; Laureys, Steven • 2017 • Frontiers in Human Neuroscience

Conducted text analysis on 154 French freely-written NDE narratives (Greyson NDE Scale >=7/32, mean score 16; mean 22 years post-experience) to determine whether NDE features appear in a fixed temporal order. Two independent coders identified and ordered 11 isolated and 5 diffuse features (kappa=0.95). Feeling of peace was most common (80%), followed by bright light (69%) and spirits/people (64%); OBE was most often the first feature (35%) and returning to body the last (36%). The most frequent 4-feature sequence (OBE-Tunnel-Light-Peace) appeared in only 22% of relevant narratives. No universal feature sequence exists; each NDE narrative is highly individual.

#nde_phenomenology #text_analysis #temporal_sequence #feature_frequency #greyson_scale

Characteristics of Memories for Near-Death Experiences

Moore, L.E; Greyson, B • 2017 • Consciousness and Cognition

The largest study to date (N=122) examining the phenomenological characteristics of NDE memories using the full 38-item Memory Characteristics Questionnaire (MCQ). NDE survivors completed the MCQ for three memories: their NDE, a real event around the same time, and an imagined event. Repeated measures ANOVA showed NDE memories rated significantly higher than real event memories, which were in turn higher than imagined event memories (F = 113.67, p < 0.001, η² = 0.486). This 'realer than real' pattern held for 4 of 5 MCQ factors (Clarity, Contextual, Thoughts/Feelings, Intensity of Feelings) with large effect sizes. The effect was robust to confounds including age, time elapsed, gender, cardiac arrest, and drug use. NDE depth correlated with MCQ scores (r = 0.42, p < 0.001) even after controlling for emotional valence (partial r = 0.355). Extends Thonnard et al. (2013) and Palmieri et al. (2014) with 15x larger sample.

#nde #memory #reality_monitoring #phenomenology #consciousness

Epistemological Implications of Near-Death Experiences and Other Non-Ordinary Mental Expressions: Moving Beyond the Concept of Altered State of Consciousness

Facco, Enrico; Agrillo, Christian; Greyson, Bruce • 2015 • Medical Hypotheses

Examining epistemological implications of near-death experiences and other non-ordinary mental expressions (NOMEs), this paper critiques proposed neurobiological NDE explanations — retinal ischemia, endogenous opioids, temporal lobe epilepsy, NMDA receptors, and REM intrusion — finding each unsupported by clinical evidence. NDE incidence is 10-18% in critical-condition patients; NDE memories show theta-band EEG consistent with true episodic memory. The authors trace the mechanist-reductionist paradigm to Galileo and Descartes, proposing to replace the 'altered states of consciousness' framework with NOMEs, integrating first-person and third-person perspectives per Varela's neurophenomenology.

#epistemology_of_consciousness #non_ordinary_mental_expressions #mind_brain_relationship #altered_states_critique #neurophenomenology

Near-Death Experiences in Non-Life-Threatening Events and Coma of Different Etiologies

Charland-Verville, V; Jourdan, J.P; Thonnard, M; Ledoux, D; Donneau, A.F; Quertemont, E; Laureys, S • 2014 • Frontiers in Human Neuroscience

This retrospective study used the Greyson NDE scale to compare 190 self-reported near-death experiences: 50 'NDE-like' experiences from non-life-threatening events (sleep, syncope, meditation, drugs) and 140 'real NDEs' from coma survivors (anoxic n=45, traumatic n=30, other n=65). NDE intensity and content did not differ between NDE-like and real NDE groups (total score 17+/-7 vs 16+/-6, p=0.10), nor within the real NDE group across coma etiologies (p=0.29). Peacefulness was the most frequently reported feature (89-93%); only 1% reported negative experiences. Comparing retrospective anoxic data to historical prospective studies revealed significantly higher overall feature frequencies retrospectively (GEE p<0.0001), with the exception of encounters with deceased spirits which were more frequent prospectively (57% vs 27%, OR=0.27, p=0.004).

#nde #non_life_threatening #greyson_nde_scale #phenomenology #retrospective

"Reality" of near-death-experience memories: evidence from a psychodynamic and electrophysiological integrated study

Palmieri, Arianna; Calvo, Vincenzo; Kleinbub, Johann R; Meconi, Federica; Marangoni, Matteo; Barilaro, Paolo; Broggio, Alice; Sambin, Marco; Sessa, Paola • 2014 • Frontiers in Human Neuroscience

This study investigated whether NDE memories are phenomenologically and neurally distinct from imagined event memories. Ten NDE experiencers (Greyson scale ≥7) and 10 matched controls recalled real and target memories (NDE or imagined) before and after hypnotic induction. Memory Characteristics Questionnaire assessed phenomenology; 32-channel EEG recorded neural activity during recall across delta, theta, alpha, beta, and gamma bands. NDE memories showed similar detail richness to real memories and significantly more than imagined memories (p=0.021). NDE recall uniquely correlated with delta (2-3 Hz) and theta (3.5-6 Hz) band power, whereas real memories correlated with high alpha and gamma bands. Hypnosis significantly increased memory detail across all conditions (all p<0.02). Findings suggest NDE memories are stored as episodic memories of events experienced in a peculiar state of consciousness, phenomenologically indistinguishable from real memories but with distinct neural markers.

#nde #memory #eeg #hypnosis #experimental

AWARE--AWAreness during REsuscitation--A prospective study

Parnia, Sam; Spearpoint, Ken; de Vos, Gabriele; Fenwick, Peter; Goldberg, Diana; Yang, Jie; Zhu, Jiawen; Baker, Katie; Killingback, Hayley; McLean, Paula; Wood, Melanie; Zafari, A. Maziar; Dickert, Neal; Beisteiner, Roland; Sterz, Fritz; Berger, Michael; Warlow, Celia; Bullock, Siobhan; Lovett, Salli; McPara, Russell Metcalfe Smith; Marti-Navarette, Sandra; Cushing, Pam; Wills, Paul; Harris, Kayla; Sutton, Jenny; Walmsley, Anthony; Deakin, Charles D; Little, Paul; Farber, Mark; Greyson, Bruce; Schoenfeld, Elinor R • 2014 • Resuscitation

A four-year multicenter observational study across 15 US, UK, and Austrian hospitals examined the incidence and nature of cognitive experiences during cardiac arrest (CA). Of 2060 CA events, 140 survivors completed initial interviews and 101 completed detailed follow-ups using a three-stage quantitative and qualitative interview system. Results showed 46% had memories during CA with seven major cognitive themes, 9% had experiences compatible with NDEs on the Greyson Scale, and 2% described full awareness with explicit recall of seeing and hearing resuscitation events. One patient demonstrated verified conscious awareness for approximately 3 minutes during a period when cerebral function was not expected, accurately describing specific details confirmed by medical staff.

#cardiac_arrest_awareness #prospective_study #visual_awareness_test #consciousness_during_resuscitation #greyson_nde_scale

Near death experiences: a multidisciplinary hypothesis

Bókkon, István; Mallick, Birendra N; Tuszynski, Jack A • 2013 • Frontiers in Human Neuroscience

A biophysical hypothesis proposes that brilliant light perception during near-death experiences arises from bioluminescent biophoton emission caused by unregulated free radical overproduction in retinotopic visual areas during brain hypoxia and reperfusion. Rat brain studies showed ultraweak chemiluminescence rising from 11±15 to 231±35 counts/10s-g during hypoxia, with spectral peaks at 480–700 nm consistent with singlet oxygen species. The model extends to visual imagery in NDEs via REM sleep-associated dream-like biophysical picture representations from long-term visual memory stored as epigenetic codes. The authors further speculate that self-consciousness may involve low-energy quantum entanglements via biophotons, potentially persisting outside the body during NDEs.

#biophotons #phosphenes #free_radicals #quantum_consciousness #visual_neuroscience

Infrequent Near Death Experiences in Severe Brain Injury Survivors - A Quantitative and Qualitative Study

Hou, Yongmei; Huang, Qin; Prakash, Ravi; Chaudhury, Suprakash • 2013 • Annals of Indian Academy of Neurology

Prospective study examining NDE incidence in 86 survivors of severe traumatic brain injury with prolonged post-traumatic coma (GCS<8, coma>72hrs, PTA>7days) at Guangdong 999 Brain Hospital, China. Using NDES cutoff ≥7, only 3 patients (3.5%) reported clear NDEs, markedly lower than cardiac arrest studies (10-35%). IPA of the 3 NDE experiencers revealed four themes: unique light visions, intense emotions, helplessness, and supernatural-but-rational interpretations. Notably, no out-of-body experiences were reported. Results support the 'dying brain' hypothesis - NDEs may require specific neurophysiological dying processes absent in trauma-induced coma.

#traumatic_brain_injury #post_traumatic_coma #qualitative_analysis #incidence_study #dying_brain_hypothesis

Characteristics of Near-Death Experiences Memories as Compared to Real and Imagined Events Memories

Thonnard, Marie; Charland-Verville, Vanessa; Bredart, Serge; Dehon, Hedwige; Ledoux, Didier; Laureys, Steven; Vanhaudenhuyse, Audrey • 2013 • PLoS ONE

Study comparing phenomenological characteristics of NDE memories with real and imagined event memories using the Memory Characteristics Questionnaire (MCQ) across four groups: 8 NDE patients, 6 coma patients with non-NDE memories, 7 coma patients without memories, and 18 healthy controls (N=39). NDE memories had significantly higher MCQ total scores than all other memory types (p<0.05), with more self-referential information, emotional content, and clarity than coma memories (all p<0.02). A group effect on target memories was significant (H(3,N=39)=20.57, p<0.001). Authors conclude NDE memories cannot be considered imagined events and propose they are flashbulb memories of hallucinations.

#memory_characteristics #phenomenology #flashbulb_memory #memory_characteristics_questionnaire #coma_survivors

Non-local Consciousness: A Concept Based on Scientific Research on Near-Death Experiences During Cardiac Arrest

van Lommel, Pim • 2013 • Journal of Consciousness Studies

Reviews four prospective NDE studies in cardiac arrest survivors, primarily the Dutch study (344 patients, 10 hospitals, 1988–1992), where 18% reported NDEs including OBE (24%), tunnel (30%), life review (13%), and meeting deceased relatives (30%). Three other prospective studies (Greyson 2003, Parnia et al. 2001, Sartori 2006) found 11–23% NDE incidence with similar conclusions. No physiological, psychological, or pharmacological variable predicted NDE occurrence. EEG flatlines within 15 seconds of cardiac arrest; CPR provides only 5–10% of normal cerebral blood flow, insufficient for conscious experience. Longitudinal follow-up at 2 and 8 years showed lasting life transformation in NDE experiencers vs. controls. Proposes a non-local consciousness model in which the brain functions as a transceiver rather than a producer of consciousness.

#nde_cardiac_arrest #nonlocal_consciousness #prospective_study #consciousness_survival #flatline_eeg

Surge of neurophysiological coherence and connectivity in the dying brain

Borjigin, Jimo; Lee, UnCheol; Liu, Tiecheng; Pal, Dinesh; Huff, Sean; Klarr, Daniel; Sloboda, Jennifer; Hernandez, Jason; Wang, Michael M; Mashour, George A • 2013 • Proceedings of the National Academy of Sciences

Continuous six-channel EEG recordings in nine rats revealed that cardiac arrest triggers a transient (~30 s) surge of highly organized gamma oscillations before isoelectric EEG. Low-gamma (25–55 Hz) power during the near-death state exceeded 50% of total EEG power (vs. <5% waking; P < 0.0005), with global coherence more than doubling relative to waking (P < 0.001). Directed connectivity via normalized symbolic transfer entropy showed feedback (top-down) low-gamma connectivity eight-fold above waking levels (P < 0.0001). Phase-amplitude coupling patterns paralleled signatures of conscious visual processing. CO2 asphyxiation produced comparable results, ruling out pain artifacts. The authors conclude the mammalian brain can generate neural correlates of heightened conscious processing at near-death.

#gamma_oscillations #cardiac_arrest #eeg_coherence #cross_frequency_coupling #neural_correlates_consciousness

Near-Death Experiences Between Science and Prejudice

Facco, Enrico; Agrillo, Christian • 2012 • Frontiers in Human Neuroscience

A systematic critique of eight neurobiological explanations for NDEs — retinal ischemia, CO₂/acidosis, temporal lobe dysfunction, endogenous opioids, hallucinogen analogies, REM intrusion, G-force loss of consciousness, and psychological expectation. Drawing on ICU anesthesiology experience, argues that cerebral anoxia produces confusion and delirium qualitatively unlike NDEs' characteristic clarity. Notes that only ~12% of cardiac arrest patients report NDEs, though physiological causes should affect most. Rejects Mobbs & Watt's (2011) Cotard syndrome analogy as phenomenologically opposite. Concludes reductionism applied as absolute truth becomes dogma, and calls for a neutral epistemological position.

#neurobiological_critique #consciousness #epistemology #hypothesis_theory #reductionism

Terminal lucidity: A review and a case collection

Nahm, Michael; Greyson, Bruce; Kelly, Emily Williams; Haraldsson, Erlendur • 2012 • Archives of Gerontology and Geriatrics

A 250-year literature survey identified 83 cases of 'terminal lucidity' — the unexpected return of mental clarity and memory shortly before death in patients with severe psychiatric and neurological disorders. Cases span brain abscesses, tumors, strokes, Alzheimer's disease, meningitis, schizophrenia, and affective disorders. Historical asylum data showed 13% of 139 deceased patients had considerably improved mental states at death; a modern nursing home study found 7 of 10 caregivers had witnessed the phenomenon. Two distinct patterns emerged: gradual improvement paralleling physical decline, and sudden full clarity just before death. The authors argue these cases, particularly those involving extensive brain tissue destruction, challenge prevailing neurological models of cognition and memory.

#terminal_lucidity #end_of_life #dementia_remission #mind_brain_relationship #case_collection

Cosmological Implications of Near-Death Experiences

Greyson, Bruce • 2011 • Journal of Cosmology

Near-death experiences reported during cardiac arrest and general anesthesia include enhanced mentation, veridical out-of-body perceptions, and visions of deceased persons not known to have died. Drawing on prospective studies showing 12-18% of cardiac arrest survivors report NDEs despite flat-line EEG within 10-20 seconds, a UVA case collection where 22% of NDEs occurred under anesthesia, and Holden's (2009) review finding 92% of veridical OBE reports completely accurate, this review argues that complex consciousness under conditions where neuroscience deems it impossible requires a revised cosmology. The shift from materialist reductionism to a framework including consciousness as fundamental is compared to the historical transition from classical to quantum physics.

#cardiac_arrest #veridical_perception #mind_brain_relationship #consciousness_survival #terminal_lucidity

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

Mobbs, Dean; Watt, Caroline • 2011 • Trends in Cognitive Sciences

Approximately 3% of Americans report near-death experiences (NDEs), which classically involve out-of-body sensations, a tunnel of light, encounters with deceased persons, and feelings of bliss. This concise review argues that each NDE feature maps onto known neuroscience: tunnel vision and bright light are attributed to retinal ischemia and peripheral-to-foveal cortical disinhibition; out-of-body experiences to disruption of the right temporoparietal junction (Blanke et al. 2002 stimulation studies); the sense of being dead to Cotard syndrome (right parietal damage); encounters with the deceased to expectation-driven dopaminergic hallucinations (as in Parkinson's disease); and life review and REM components to locus coeruleus-noradrenaline activation. Positive emotions may reflect endogenous opioid and dopamine release under extreme danger. The authors conclude that no paranormal explanation is needed.

#nde_neuroscience #skeptical_review #temporal_lobe #rem_intrusion #cotard_syndrome

Seeing Dead People Not Known to Have Died: "Peak in Darien" Experiences

Greyson, Bruce • 2010 • Anthropology and Humanism

'Peak in Darien' experiences — near-death visions in which dying persons see recently deceased individuals whose death was unknown to anyone present — are reviewed across historical and contemporary cases from the 1st century AD (Pliny the Elder) through 2008 (Sartori). Cases are classified into three types with increasing evidential weight: deceased thought to be alive, deceased who died immediately before the vision, and deceased unknown to the experiencer. From a collection of 665 NDEs at the University of Virginia, 138 (21%) included encounters with deceased persons versus only 25 (4%) with living persons. These cases challenge the expectation/hallucination hypothesis and are argued to provide some of the strongest evidence for survival of consciousness after bodily death.

#deathbed_visions #peak_in_darien #survival_evidence #case_compilation #after_death_communication

Consistency of Near-Death Experience Accounts over Two Decades: Are Reports Embellished over Time?

Greyson, Bruce • 2007 • Resuscitation

Longitudinal test-retest study of NDE memory reliability. 72 NDE experiencers (63% of 115 surviving original cohort) completed the NDE Scale in the early 1980s and again 2002-2005, mean interval 19.1 years (SD=2.4), without reference to original responses. Total NDE Scale scores unchanged: T1=14.60±6.97, T2=14.24±7.94, t(71)=0.69, p=0.49. Test-retest r=0.83 (p<0.001) for total; all 4 factors and 16 items at p<0.001. Score changes not correlated with time elapsed (r=-0.14, p=0.24). Contrary to embellishment hypothesis, positive affect reports showed nonsignificant decline. Published in Resuscitation.

#memory_reliability #test_retest #longitudinal #NDE_Scale #embellishment

Does the Arousal System Contribute to Near-Death and Out-of-Body Experiences? A Summary and Response

Long, Jeffrey; Holden, Janice Miner • 2007 • Journal of Near-Death Studies

A detailed 35-page critique of Nelson, Mattingly, Lee, and Schmitt's (2006) Neurology paper proposing that NDEs result from REM-intrusion via arousal-system dysfunction, and their 2007 follow-up linking OBEs to the same system. Long and Holden identify eight major weaknesses: (1) 40% of NDErs denied any REM-intrusion experiences; (2) survey questions lacked validity — 'yes' answers may reflect post-NDE aftereffects rather than pre-existing diathesis; (3) the control group (medical personnel) likely underreported REM intrusion due to awareness of pathological implications (7% vs. 19-28% general population prevalence); (4) the control group was not matched for life-threatening event exposure; (5) NDEs occur when REM is suppressed (general anesthesia, barbiturate overdose, congenital blindness without REM); (6) NDE features (coherent narrative, profound peace, veridical perception) differ fundamentally from REM intrusion (brief, terrifying, bizarre hallucinations); (7) NDERF data show 73.5% of NDErs report the experience as 'more real than real' vs. dreams; (8) NDEs have a consistent deep structure across cultures, whereas REM dreams do not.

#nde_critique #rem_intrusion_rebuttal #arousal_system #veridical_perception #nderf_survey

Does the Arousal System Contribute to Near-Death and Out-of-Body Experiences? A Summary and Response

Long, Jeffrey; Holden, Janice Miner • 2007 • Journal of Near-Death Studies

Long and Holden examine the REM intrusion hypothesis proposed by Nelson et al. (2006, 2007) in Neurology, which suggested that near-death experiences arise from disruptions in the arousal system. They identify multiple methodological weaknesses: survey questions may not have validly assessed REM intrusion; the comparison group (medical personnel) likely underreported sleep phenomena; temporal ambiguity means reported experiences could be NDE aftereffects rather than predispositions. NDEs occur under general anesthesia, in congenitally blind individuals, and without fight-or-flight activation — conditions incompatible with REM intrusion. The diathesis-stress model of NDEs remains 'entirely hypothetical,' and prospective hospital-based research designs are recommended.

#rem_intrusion #arousal_system #methodological_critique #obe_phenomenology #diathesis_stress_model

Near-Death Experience, Consciousness, and the Brain: A New Concept About the Continuity of Our Consciousness Based on Recent Scientific Research on Near-Death Experience in Survivors of Cardiac Arrest

van Lommel, Pim • 2006 • World Futures

In a prospective study of 344 consecutive cardiac arrest survivors across ten Dutch hospitals, 62 (18%) reported near-death experiences, with 41 (12%) having core experiences. Neither physiological (cerebral anoxia), psychological (fear of death), nor pharmacological factors explained why only 18% had NDEs despite all being clinically dead. Longitudinal follow-up at 2 and 8 years revealed lasting transformational changes exclusively in NDE patients. Since EEG becomes isoelectric within 10–20 seconds of cardiac arrest, these experiences occurred during absence of measurable cortical activity. A nonlocal consciousness model is proposed: the brain functions as a receiver for consciousness fields in ‘phase-space,’ rather than producing consciousness.

#cardiac_arrest #consciousness_survival #nonlocal_consciousness #prospective_study #mind_brain_relationship

Out-of-Body Experience and Autoscopy of Neurological Origin

Blanke, Olaf; Landis, Theodor; Spinelli, Laurent; Seeck, Margitta • 2004 • Brain

Six neurological patients experiencing out-of-body experiences (OBE) or autoscopy (AS) were studied with phenomenological interviews, EEG, electrical cortical stimulation, neuropsychological testing, and neuroimaging. In 5 of 6 patients, brain damage or dysfunction localized to the temporo-parietal junction (TPJ). OBE was always preceded by supine position and accompanied by vestibular sensations (elevation, floating); in Patient 3, OBE was reliably induced by electrical stimulation at the right TPJ at 3.5 mA. The authors propose that OBE requires both a disintegration of proprioceptive-tactile-visual body information and a vestibular dysfunction disrupting the relationship between personal and extrapersonal space, both due to paroxysmal TPJ dysfunction.

#temporo_parietal_junction #body_schema #vestibular_dysfunction #multisensory_integration #autoscopy

Incidence and Correlates of Near-Death Experiences in a Cardiac Care Unit

Greyson, Bruce • 2003 • General Hospital Psychiatry

A 30-month prospective survey of 1,595 patients admitted to the cardiology service at the University of Virginia identified near-death experiences using the NDE Scale (≥7 threshold). Of 116 cardiac arrest survivors, 10% reported NDEs compared to 1% of patients with other cardiac diagnoses (P<.001). NDErs (N=27) were younger (56±13 vs 64±13, P<.001), more likely to have lost consciousness (63% vs 18%, P<.001), reported more prior purportedly paranormal experiences (P=.009), and showed greater approach-oriented death acceptance (P=.01). No differences were found in cognitive function, quality of life, cardiac dysfunction severity, objective proximity to death, or coronary prognosis. The largest prospective NDE survey in cardiac patients at time of publication.

#nde_incidence #cardiac_arrest #nde_scale #prospective_survey #death_attitudes

Stimulating illusory own-body perceptions

Blanke, Olaf; Ortigue, Stéphanie; Landis, Theodor; Seeck, Margitta • 2002 • Nature

Focal electrical stimulation of the right angular gyrus in a 43-year-old epilepsy patient undergoing presurgical evaluation reproducibly induced out-of-body experiences. At lower currents (2.0–3.0 mA), vestibular sensations of sinking or falling were reported; at 3.5 mA, the patient described seeing herself lying in bed from above, floating near the ceiling. The same site also induced complex somatosensory illusions: legs appearing shorter, arms seeming to move toward the face. OBE visual content was restricted to body parts also subject to somatosensory distortion, and the epileptic focus was >5 cm away. These findings suggest OBEs result from a failure to integrate somatosensory and vestibular information at the temporo-parietal junction.

#electrical_stimulation #angular_gyrus #vestibular_processing #somatosensory_integration #case_study

Near-Death Experience in Survivors of Cardiac Arrest: A Prospective Study in the Netherlands

van Lommel, Pim; van Wees, Ruud; Meyers, Vincent; Elfferich, Ingrid • 2001 • The Lancet

Prospective study of 344 consecutive cardiac arrest patients resuscitated across ten Dutch hospitals (1988-1992). Of these, 62 (18%) reported near-death experiences, with 41 (12%) describing core experiences and 23 (7%) deep experiences on the weighted core experience index. NDE occurrence was unrelated to duration of cardiac arrest or unconsciousness, medication, or fear of death — findings that challenge purely physiological explanations such as cerebral anoxia. Patients under age 60 reported more NDEs (p=0.012) and women had deeper experiences (p=0.011). Longitudinal follow-up at 2 and 8 years showed NDE patients underwent sustained transformational changes including decreased fear of death and increased spirituality compared to matched controls.

#cardiac_arrest #prospective_study #consciousness_survival #longitudinal #transformational_changes

Posttraumatic Stress Symptoms Following Near-Death Experiences

Greyson, Bruce • 2001 • American Journal of Orthopsychiatry

A cross-sectional survey compared posttraumatic stress symptoms in 148 near-death experiencers and 46 individuals who came close to death without NDEs, using the Impact of Event Scale (IES). NDErs scored 9.0 points higher on the overall IES (95% CI = 3.4–13.7), but the elevation was confined to intrusive re-experiencing symptoms; avoidance symptoms did not differ between groups. Multiple regression confirmed NDEs as a significant predictor of intrusion (B = 7.59, p < 0.001) but not avoidance, after controlling for demographics and event characteristics. NDErs' scores fell 1.2 SD below a clinical PTSD criterion sample, suggesting a nonspecific stress response rather than clinical PTSD.

#ptsd_trauma #impact_of_event_scale #intrusive_memories #dissociation_nde #aftereffects

Near-Death Experiences with Reports of Meeting Deceased People

Kelly, Emily Williams • 2001 • Death Studies

Analyzing 553 NDE cases from the University of Virginia collection, 74 cases involving reports of meeting recognized deceased persons were compared against 200 cases without such reports (for which medical records were available). People closer to death were significantly more likely to report seeing deceased persons (76% vs 51%, χ² = 6.69, p < .01). Deceased-person cases were associated with sudden-onset conditions (accidents, cardiac arrests) rather than gradual ones (surgery, childbirth; χ² = 13.02, p < .025). No age difference existed between groups, and 32% of deceased persons seen were emotionally neutral or never met. These patterns weaken the expectation/hallucination hypothesis and warrant more serious consideration of the survival hypothesis.

#deceased_encounters #survival_hypothesis #expectation_hypothesis #case_analysis #medical_records

Near-Death and Out-of-Body Experiences in the Blind: A Study of Apparent Eyeless Vision

Ring, Kenneth; Cooper, Sharon • 1997 • Journal of Near-Death Studies

Interviewed 31 blind respondents (14 blind from birth, 11 adventitiously blind, 6 severely visually impaired) about NDEs (n=21) and OBEs (n=10). Blind persons reported classic Moody-type NDEs indistinguishable from sighted persons' experiences. 80% (25/31) claimed visual perception during their episodes, including 64% (9/14) of those blind from birth. Two corroborative cases were documented: a totally blind man correctly identified a tie's color and pattern, and a newly blinded woman accurately described a hospital corridor scene confirmed by independent witness. After rejecting dream, retrospective reconstruction, blindsight, and skin-based vision hypotheses, the authors propose 'transcendental awareness' — a multisensory mode of knowing that transcends physical sight.

#blind_respondents #out_of_body_experience #veridical_perception #transcendental_awareness #qualitative_interviews

The Near-Death Experience Scale: Construction, Reliability, and Validity

Greyson, Bruce • 1983 • The Journal of Nervous and Mental Disease

Constructed and validated the 16-item Near-Death Experience Scale from an initial pool of 80 NDE manifestations. Administered 33-item preliminary questionnaire to 67 IANDS members describing 74 NDEs. Final scale comprises 4 components: Cognitive, Affective, Paranormal, and Transcendental. Scale showed high internal consistency (alpha = .88), split-half reliability (.92 corrected), test-retest reliability (.92 over 2-6 months), and strong criterion validity (r = .90 with Ring's WCEI). Cut-off score of 7 identified 83.8% of self-reported NDE experiencers. Scale differentiates NDEs from organic brain syndromes and nonspecific stress responses.

#nde_scale #psychometrics #scale_construction #measurement #validation

Reflections on Life After Life

Moody, Raymond A., Jr • 1977

Sequel to Life After Life (1975) documenting hundreds of additional near-death experience interviews. Identifies new elements beyond the original fifteen: Vision of Knowledge (timeless realm of all knowledge), Cities of Light (brilliant structures), Realm of Bewildered Spirits (confused figures in dull areas), and Supernatural Rescues. Reports that independent investigators including Elisabeth Kubler-Ross were collecting identical accounts, confirming widespread occurrence. Includes detailed methodological considerations for future NDE research with recommendations for controlled studies and verification procedures for out-of-body claims. The fifteen common elements from Life After Life continued to recur in the expanded sample.

#nde #near_death_experiences #consciousness_survival #qualitative_interviews #out_of_body_experience

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