Recent study of near-death experience survivors flies in the face of neuroscience’s assertion about NDEs.
photo by Carl A
According to science’s current model, your minute-by-minute experience — all your thoughts, feelings, and emotions — are a product of your brain. Neuroscientists are especially fond of this worldview and as a result have been extremely resistant to near-death experience research suggesting cardiac arrest patients experience hyper-lucid, conscious experiences during a time when their brain is severely compromised.
One often repeated speculation among neuroscientists has been that NDEs are a dream-like, after-the-fact recreations. But a recently published study from the University of Liège in Belgium compared the memories of NDEs with memories of others who were in coma without an NDE. They found that memories of NDEs are significantly different from coma patients without an NDE. In particular they have significantly more characteristics, like visual details, memory clarity, self-referential information (being involved in the event) and emotional content.
The researchers propose that NDEs can’t be considered as imagined events, which have significantly fewer characteristics. NDE events are really perceived but since the events did not occur in reality and likely result from physiological conditions (e.g., neurological dysfunction), the events are actually hallucinatory (see also ULg video). This conclusion is based on assumptions that are inconsistent with other evidence from NDEs. Other interpretations are possible.
Seven researchers from the University of Liège, led by Dr. Steven Laureys, published a report in the peer-reviewed scientific journal PLoS ONE on the characteristics of memories from near-death experiences compared with the memories from others who were in coma but did not report an NDE. The study also compared NDE memories with memories of real events and imagined events (e.g., past dreams or fantasies).
This finding is a direct challenge to neuroscientists, and other NDE-non-believers who proposed that NDEs are dream-like memories of events that never happened, or are altered memories of real events which are partly or fully imagined.
The study’s researchers included 21 patients who suffered from an acute brain insult and coma. The patients were divided into three groups: those reporting an NDE (≥ 7 on the Greyson scale, N=8), those reporting memories during coma but without an NDE (< 7 on the Greyson scale, N=6) and those reporting no memories of their coma (N=7). These three groups were all similar in etiology of the brain insult (traumatic, anoxic, hemorrhagic, metabolic and encephalopathic etiologies), as well as age and time since insult. The 21 coma patients were also compared with 18 healthy control subjects.
The researchers measured the memory characteristics of patients using the Memory Characteristics Questionnaire (MCQ), comparing the target memories (NDE or coma memories) versus memories of real events and imagined events (e.g., past dreams or fantasies). The memory characteristics included sensory details (visual, auditory, etc.), memory clarity (e.g., mentally reliving the events when remembering), self-referential information(memories of being involved in the event) and emotionality (e.g., feeling the emotions of the event when remembering).
The researchers found that memories of NDEs have significantly more characteristics than both memories of real events and imagined events (p<0.02), that is, in general the NDE memories had extremely high emotional content and were more vivid and “real” to the NDEr, even compared with memories of recent real events. Thus, “NDEs can’t be considered as typical imagined event memories”. The NDE memories “seem to be unique, unrivaled memories”.
[easy-tweet tweet=”This study of near-death experience survivors flies in the face of neuroscience’s assertion about NDEs.” via=”no” usehashtags=”no”]
The memories of NDEs also have significantly more self-referential, emotional and memory clarity characteristics than memories from coma without an NDE (all p<0.02), that is, in general the NDEr remembered being more involved in the event than the non-NDE coma patient. The researchers suggest that “what makes the NDEs ‘unique’ is not being ‘near-death’ but rather the perception of the experience itself”.
Furthermore, since it is possible that the core components of an NDE are neurophysiologically determined(e.g., temporo-parietal junction dysfunction or deficit), then “the subject really perceived these phenomena”. However, since the perceived events did not occur in reality, the perceptions are hallucinatory. Indeed,memories of NDEs are likely ‘flashbulb memories’ of hallucinations.
CNN also published an in-depth news article on this study.
The researchers’ conclusions are based on two assumptions that are inconsistent with other evidence from NDEs: (1) that the perceived events do not occur in reality and (2) that NDE phenomena are determined neurophysiologically. Therefore, other interpretations are possible.
The first assumption, that perceived events in an NDE do not occur in reality, is not consistent with the veridical perceptions that are reported by NDErs. In fact, nearly all “apparently nonphysical veridical perceptions” (AVPs) are verified when checked. Janice Holden (2009) reported that of 93 veridical perception cases in the NDE literature, 92% were completely accurate, 6% were accurate with some errors and only one case was completely erroneous. The AVPs are frequently of objects or events outside the NDEr’s physical line of sight or at a distant location from the NDEr’s physical body.
Furthermore, previously unknown veridical information received during the “transcendent” part of the NDE(e.g. meeting deceased relatives) is frequently later verified. For example, a man saw and interacted with an apparently deceased person and later found out the man was his biological father who had died in the holocaust (van Lommel, 2010, pp. 32-33).
Since the perceived events in fact occurred or accurately conveyed previously unknown information, one cannot conclude that NDE perceptions are hallucinations. If some parts of the NDE events were perceived accurately, where do the NDE perceptions become unreal? If a patient accurately describes the details of operating room events while he had no heart beat or blood pressure, at what point did the other parts of his experience (the tunnel and light) become an hallucination?
Eben Alexander’s experience included both veridical perceptions and an episode of “ICU psychosis”. During his recovery, he experienced intense delusions and very vivid dreams but both were completely different from the “astonishing clarity and vibrant richness—the ultra-reality” of his NDE (Alexander, 2012, pp. 117-118). His NDE memories are consonant with the results of this study but point out the stark difference between true hallucinations and NDE memories. The finding that NDE memories contain both more emotional and self-referential information than other target memories is more likely due to the hyperreal and veridical qualities of the experience than vice versa.
The second assumption, that NDE phenomena are neurophysiologically determined, is not consistent with the full spectrum of NDE cases. A number of physiological factors are generally cited in explanations of NDEs (Greyson et al., 2009). None of these factors is adequate to explain NDE phenomena, because (1) the reported physiologically-caused experiences bear only a slight resemblance to NDEs, (2) many NDEs occur under conditions without the suggested physiological factor, and/or (3) in cases where the physiological factor is present, NDEs are not reported in even a large percent of cases.
Furthermore, many NDEs occur during cardiac arrest which results in complete cessation of blood flow to the brain. In these cases, heightened, lucid awareness and thought processes are reported, the same kind of experiences as are remembered by patients in this study (van Lommel, 2010, pp. 159–176). In these NDEs, neurophysiological causes of the core components of the NDE could not have occurred because the brain was not functioning. Veridical perceptions of the onset of resuscitation efforts also establish the time of the experience to be when the brain had no electrical activity.
- Alexander, Eben (2012). Proof of Heaven: A neurosurgeon’s journey into the afterlife. New York: Simon & Schuster.
- Greyson, B., Kelly, E. W., & Kelly, E. F. (2009). Explanatory models for near-death experiences. In J. M. Holden, B. Greyson, & D. James (Eds.), The Handbook of Near-Death Experiences: Thirty years of investigation (pp. 213–234). Santa Barbara, CA: Praeger Publishers.
- Holden, Janice M. (2009). Veridical perception in near-death experiences. In J. M. Holden, B. Greyson & D. James (Eds.), The Handbook of Near-Death Experiences: Thirty years of investigation (pp. 185–211). Santa Barbara, CA: Praeger Publishers.
- Thonnard M, Charland-Verville V, Brédart S, Dehon H, Ledoux D, et al. (2013) Characteristics of Near-Death Experiences Memories as Compared to Real and Imagined Events Memories. PLoS ONE 8(3): e57620.doi:10.1371/journal.pone.0057620.
- van Lommel, P. (2010). Consciousness beyond life: The science of the near-death experience. New York: HarperCollins.
Originally published by Robert Mays on IANDS.org
More From Skeptiko
- Rob and Trish MacGregor have written over a hundred books and created the Mystical Underground podcast. Subscribe: Click here for forum Discussion Click here for Mystical Underground website [00:00:00] Alex Tsakiris: On this episode of skeptiko, A guest appearance …
- Dr. Rob Williams and Brandon Zollino, dive deep into intellectual freedom and unity on Plan V TV. Subscribe: Click here for forum Discussion Click here for Dr. Rob Williams’ Website Click here for Brandon’s Facebook Page [00:00:00] Alex …
- Dr. Gregory Shushan is the world’s leading authority on the study of near-death experiences across culture and time. Subscribe: Click here for forum Discussion Click here for Dr. Shushan’s Book Click here for Dr. Shushan’s Website [00:00:00] Alex Tsakiris: …
- Richard Cox’s new book examines parallels between conspiracy theory analysis and insights gained through spiritual development. Subscribe: Click here for forum Discussion Click here for forum Discussion Click here for Richard’s Book Click here for Richard’s Podcast [00:00:00] Alex …
- Andy Rouse has created a podcast that doesn’t shy away from tough discussions. Subscribe: Click here for forum Discussion Click here for Andy’s Deep Share Podcast [00:00:00] Alex Tsakiris: This episode of skeptiko A show about making our puzzle …
- Nelson Apostata was an ancient history scholar before becoming interested in ETs and NDEs. Subscribe: Click here for forum Discussion [00:00:00] Alex Tsakiris: Um, This episode of skeptical. A show about love and the extended consciousness realm. [00:00:10] …
- Dr. Joanna Kujawa is a religious scholar and expert on goddesses and spirituality. Subscribe: Click here for Dr. Joanna Kujawa’s website Click here for: The Other Goddess: Goddess of Eros and Secret Knowledge Click here for forum Discussion Alex …
- Luis Jimenez, has interviewed many leading UFO researchers about the UFO threat narrative. Subscribe: Click here for Luis Jimenez’s website Click here for forum Discussion Alex Tsakiris: On this episode of Skeptiko. A show about looking like you’re …
- Rich Giordano is a long-time UFO investigator and the creator and host of GUFON. Subscribe: Click here for Rich Giordano’s website Click here for forum Discussion Alex Tsakiris: On this episode of Skeptiko a show about liars. [00:00:07] Rich …