Get the smelling salts…you will need them after this!
Firstly, thank you to all those who bought one of my recent books. You will be relieved to hear I won’t be banging on about these for a while now! Back to the day job!
This paper was published in July by Charlotte Marshall from Liege University in Belgium. She has a strong research record in the field of consciousness, and her name is attached to many of the papers we may have discussed in the past, and interestingly on both sides of the debate. She has done a lot of work in psychedelics and was author of a paper that is worth a separate review which came out in August and looks at patients who have had an NDE AND psychedelic experience. (I am pretty sure I discussed this in one of the comments sections but will return to it). It is interesting, and there are some flaws in it which are common to all of these papers. It is also worth noting that Marshall is doing her own version of the AWARE study. While I think she definitely lies on the physicalist side of the debate, and is of the view that NDEs are generated by the brain, at least publicly, in my opinion, she does not appear to be of the same level of physicalist fanaticism as Bourjigin appears to be. I find her articles more balanced. Could be a smoke screen of course.
Much of her work focuses on trying to understand NDEs through various analogous brain-driven experiences: epilepsy, psychedelics and in this article induced-syncope (fainting):
EEG signature of near-death-like experiences during syncope-induced periods of unresponsiveness
Charlotte Martial, Andrea Piarulli, Olivia Gosseries, Héléna Cassol, Didier Ledoux, Vanessa Charland-Verville, Steven Laureys, NeuroImage, Volume 298, 2024, 120759,
During fainting, disconnected consciousness may emerge in the form of dream-like experiences. Characterized by extra-ordinary and mystical features, these subjective experiences have been associated to near-death-like experiences (NDEs-like). We here aim to assess brain activity during syncope-induced disconnected consciousness by means of high-density EEG monitoring. Transient loss of consciousness and unresponsiveness were induced in 27 healthy volunteers through hyperventilation, orthostasis, and Valsalva maneuvers. Upon awakening, subjects were asked to report memories, if any. The Greyson NDE scale was used to evaluate the potential phenomenological content experienced during the syncope-induced periods of unresponsiveness.
What they do in this study is use a technique to induce syncope, which is a state of lower blood pressure/oxygen to the/in the brain which causes a state in which the patient faints for a very brief time (20-30 seconds). The patient is not unconsciousness, but enters a state of “disconnected consciousness”. Their eyes may be open or closed. Their heart is still beating, there is just a sudden alteration in the amount of oxygenated blood reaching neurons due to the physical process they went through. You probably did it when you were a teen…hold your nose and mouth closed and try to breath out really hard. You feel light headed etc etc. Afterwards they then do a Greyson scale questionnaire which everyone on here should be familiar with. I will come back to this. Here are some key quotes from the paper:
This study demonstrates the capability of syncope to induce episodes of disconnected consciousness, intriguingly resembling NDE episodes. Indeed, eight volunteers out of 22 (36 %) reported a subjective experience that met criteria for an NDE-like (i.e., scoring ≥7 on the Greyson NDE scale.
Interestingly, both DMT- and ketamine-induced experiences are known to closely resemble NDE phenomenology (Martial et al., 2019; Timmermann et al., 2018), just like we here demonstrate the resemblance of syncope-induced dream-like states with NDEs.
I will return to this in the next paper that I review in the coming weeks. I did review this paper in August, but as I said there has been a new paper that is really worth critiquing.
The hypothesis that the subjective experiences, as well as the associated pattern of electrical activity observed in this study, occur also in people who report a classical NDE in severe cerebral hypoxia is appealing but remains an open issue.
I don’t really think so as I will discuss below, but for someone from the “dark side” I approve of this use of language. It is neutral.
When it comes to this study there are three main issues (I’m sure I will think of more once people start commenting).
1.The first is something I now really agree with Sam Parnia on…this is “abuse” of the Greyson questionnaire, which was specifically designed for assessing people who had died and been revived long before serious research had been conducted in the field by skeptics. Many of the questions use descriptors that are so vague they could apply to any unusual state…even walking in a forest in a meditative state. To say that someone has had an NDE-like experience just because they score above 7 on the Greyson scale is now becoming a bit of a joke. This is the type of spurious assertion that is applied when the Greyson scale is used in psychedelic research. Marshall and Timmerman try to overcome this in the paper they published in August which I will review next time, but they don’t…as I will show. The experiences from NDEs are very very different when it comes to the kind of subjective experiences they describe. For instance here is an excerpt from a different study, cited by Marshall, from someone who had a syncope induced experience. Does this sound like anything that someone who has an authentic NDE would say?
A 48-year-old male patient was admitted for the diagnostic investigation of paroxysmal events. He experienced his first episode at age 46 when he felt “funny for milliseconds” while playing badminton. He lost consciousness immediately and fell. When he regained consciousness after about 3 min, he hallucinated many persons of small size (“like seeing them in television”) who were “parading like soldiers.” He could vividly hear their heavy steps.
Christian Brandt, Out-of-body experience and auditory and visual hallucinations in a patient with cardiogenic syncope: Crucial role of cardiac event recorder in establishing the diagnosis, Epilepsy & Behavior, Volume 15, Issue 2, 2009, Pages 254-255
I am leaning toward the term RED after all!
2. The EEG data is of a completely different type to that previously described by the likes of Borjigin in that it is not gamma, but beta, delta and theta. This is in line with psychedelics from my memory. It seems that there is as yet no consensus on exactly what EEG signals are specifically indicative for consciousness, dissociation etc. Until this is better understood, claims of EEG activity being indicative of consciousness immediately after CA or during CPR should be taken with a gargantuan pinch of salt.
3. Lastly, while all this is very interesting, I have yet to read of a veridical OBE from one of these types of study, in which a respected doctor confirmed that a subject observed things that were impossible for that patient to observe naturally. Of course, if they did, then this would actually prove dualism, although I’m sure hardened skeptics would try to create some quantum mechanical hypothesis to hide the naked truth behind. Titus Rivas created an excellent collection of these veridical OBEs in his book the Self Does not Die. This collection forms sufficient empirical evidence to support the dualist hypothesis and reject the physicalist hypothesis.
What may be happening with all these “NDE-like” experiences is that the brain is being sufficiently disrupted that it momentarily experiences “other dimensions” or states of consciousness that are much more advanced once the consciousness actually leaves the body in an authentic NDE. That is all speculation though. My immediate concern is Marshall has a strategy here to develop an ” scientific evidence-based” narrative around the hypothesis that ALL NDEs are a result of altered brain states, and that around the time of CA just such an altered brain state creates the NDEs that people report. I am very concerned that she has set up her AWARE-like study purely to reject the Dualist hypothesis, which would be easy by under-powering it, but using jargon to confuse the wider scientific community and media into believing the evidence is conclusive. My “prayer” is that she will be surprised and end up generating at least one verified OBE that supports the dualist hypothesis – this would of course give Parnia an aneurism after spending 20 years trying to achieve that! But in all truth, unless a higher power is involved, there is a miniscule chance of her study producing a verified OBE for reasons we have discussed here before
AwareofAware 