Neurochemical models of near-death experiences: A large-scale study based on the semantic similarity of written reports

@article{Martial2019NeurochemicalMO,
  title={Neurochemical models of near-death experiences: A large-scale study based on the semantic similarity of written reports},
  author={Charlotte Martial and Helena Cassol and Vanessa Charland-Verville and Carla Pallavicini and Camila Sanz and Federico Zamberlan and Roc{\'i}o Mart{\'i}nez Vivot and Fire Erowid and Earth Erowid and Steven Laureys and Bruce Greyson and Enzo Tagliazucchi},
  journal={Consciousness and Cognition},
  year={2019},
  volume={69},
  pages={52-69}
}

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References

SHOWING 1-10 OF 169 REFERENCES
DMT Models the Near-Death Experience
TLDR
A significant overlap in nearly all of the NDE phenomenological features is found when comparing DMT-induced NDEs with a matched group of ‘actual’ NDE experiencers, and a striking similarity between these states that warrants further investigation is revealed.
The Experience Elicited by Hallucinogens Presents the Highest Similarity to Dreaming within a Large Database of Psychoactive Substance Reports
TLDR
Novel quantitative analyses are applied to a large volume of empirical data to confirm the hypothesis that, among all psychoactive substances, hallucinogen drugs elicit experiences with the highest semantic similarity to those of dreams.
Response to Commentaries on "The Ketamine Model of the Near-Death Experience ..."
TLDR
The possible evolutionary advantage of the NDE mechanism is discussed, which suggests that altered states of consciousness do not require a normally functioning brain and may involve similar mechanisms to NDEs and dream sleep.
Classic Hallucinogens and Mystical Experiences: Phenomenology and Neural Correlates.
TLDR
A functional neural model of mystical experience is proposed, based on changes in the default mode network of the brain that have been observed after the administration of classic hallucinogens and during meditation practices for which mystical-type claims have been made.
Near-Death-Like Experiences without Life-Threatening Conditions or Brain Disorders: A Hypothesis from a Case Report
TLDR
This is a report on a case with most of the features typical of NDEs except that it occurred entirely without any life-threatening conditions, suggesting that a broader interpretation of the phenomenon is needed.
Near-death experiences in cardiac arrest survivors.
  • C. French
  • Psychology
    Progress in brain research
  • 2005
Using Computational Linguistics to Understand Near-Death Experiences: Concurrent Validity for the Near Death Experience Scale
Latent semantic analysis—a technique to quantify qualitative data—was used on a large dataset of near death experience (NDE) accounts for which a sizable portion also had scores on Greyson’s NDE
Phenomenology of Near-death Experiences: A Cross-cultural Perspective
TLDR
Compared the various descriptions of NDEs from a phenomenological perspective, there were similarities between particular cultures, which differed from typical western European experiences.
Is the Near-Death Experience Only N-Methyl-D-Aspartate Blocking?
Karl Jansen's interesting hypothesis that near-death experiences (NDEs) result from blockade of the N-methyl-D-aspartate receptor has several weaknesses. Some NDEs occur to individuals who are
Psychedelics, Meditation, and Self-Consciousness
TLDR
This article discusses available evidence regarding convergences and differences between phenomenological and neurophysiological data on meditation practice and psychedelic drug-induced states, and proposes that self-consciousness may be best construed as a multidimensional construct, and that “self-loss” can take several forms.
...
...