### Out-of-body experiences: the evidence explained in everyday language
The paper by Janice Miner Holden is making a pretty remarkable argument: some people who come close to death report seeing things happening around them while they were unconscious, and some of those reports supposedly match what actually happened. Holden argues that the best cases are hard to explain if the brain is the only thing producing consciousness.
Let's walk through the examples in plain English, what investigators did to check them, and how convincing the evidence really is.
The first thing to understand is that there are two different claims here:
* Claim one: People really do experience themselves floating outside their bodies. That's well established as a type of human experience.
* Claim two: Sometimes they actually see things they couldn't have seen with their physical eyes, suggesting consciousness can work independently of the brain. That's the controversial claim the paper is trying to establish.
### 1\. The surgeon's patient who supposedly saw what happened while he was dead
This is probably the paper's most important example because Holden gives a fairly detailed account of it.
### What happened?
A man had a serious heart infection and needed surgery to remove an infected heart valve. The surgeons used a heart-lung machine to keep blood circulating while they operated.
Eventually, the doctors couldn't get his blood pressure to recover when they tried to take him off the machine. They turned the machine off, his blood pressure fell to zero, and the team declared him dead.
The surgeons closed his chest and left the immediate operating area. Roughly 20 minutes later, they noticed signs of heart activity and managed to revive him.
Afterward, the patient reportedly described seeing things from a position above his body.
He described:
* The two surgeons standing in the operating-room doorway.
* The anesthesiologist coming back into the room.
* A string of Post-it notes attached to a monitor.
That last detail is particularly interesting. The lead surgeon, Lloyd Rudy, reportedly had a habit of having his nurse write down telephone messages on Post-it notes and stick each new note beneath the previous one. The patient supposedly described this ordinary workplace routine, which wasn't something the medical team had been discussing aloud.
Rudy's assistant, cardiac surgeon Roberto Amado-Cattaneo, reportedly corroborated the account and said the patient had been heavily medicated and unconscious throughout the episode. Source: Holden's discussion of Case 3.11 in The Self Does Not Die, by Rivas, Dirven and Smit (2023).
### Why is this considered evidence?
Think about it this way. Imagine you were unconscious during surgery, with your eyes closed, and afterward you described a peculiar arrangement of objects in the room that you supposedly couldn't have seen.
The researchers' reasoning is that the patient might have acquired information about the room from a viewpoint outside his physical body.
The evidence consists of three parts:
* The patient's report: He described the scene after recovering.
* The surgeon's testimony: Rudy reportedly confirmed that the patient described events and objects that were actually there.
* The assistant surgeon's testimony: Amado-Cattaneo also reportedly corroborated the account and the patient's unconscious condition.
That's stronger than someone simply saying, "I floated above myself and saw a bright light." The claim involves specific details that other people could check.
### What are the weaknesses?
There are important unanswered questions.
* The account was documented retrospectively, rather than in an experiment designed beforehand.
* We don't have a continuous recording of the patient's brain activity demonstrating that his brain could not support perception or memory at the relevant moment.
* Cardiac arrest, zero blood pressure, and a declaration of death do not automatically establish that all brain activity had ceased.
* The possibility of briefly regaining some awareness, hearing information, or reconstructing a memory must be evaluated against the original medical records and the timing of the report.
Holden discusses the possibility that the patient briefly regained consciousness and saw the notes. She argues that the heavy sedation, prolonged unconsciousness and other circumstances make that unlikely. But an unlikely explanation isn't necessarily an impossible one.
My take: This is an intriguing reported case. If the timing, details and medical circumstances are as described, it deserves investigation. It does not, by itself, prove that consciousness left the body or that the patient was experiencing anything after irreversible brain death.
### 2\. The patient who reportedly knew about a 12-digit number
This is another example Holden highlights from The Self Does Not Die.
According to her paper, one patient reported a 12-digit number displayed on top of a machine in a resuscitation room. The number was reportedly positioned so that it could be seen from a viewpoint near the ceiling but not from the patient's position in bed.
### Why does this matter?
A 12-digit number is a much better test than a vague description of a hospital room.
If somebody says, "I saw a machine," that could be a lucky guess. But if they correctly report a long, arbitrary number that they had no ordinary way of seeing, that is much harder to explain by coincidence.
The scientific question is whether the person reported the number accurately before anyone told them what it was, and whether independent records establish that the number was there at the relevant time.
### What science established it?
Holden includes this case in a collection of reports she considers completely accurate and corroborated by at least one credible third party.
However, the paper does not reproduce the complete original case documentation for every example. To assess this particular report properly, we'd want the original case narrative, the exact wording of the patient's report, the machine records or photographs, and details about when the number was verified.
My take: If independently documented exactly as described, this is the sort of case that could be quite significant. But the fact that a researcher includes a case in a collection of verified reports is not the same as having personally checked every underlying record.
### 3\. The surgeon who made a silent gesture
Holden also describes cases in which patients reportedly remembered an unusual gesture made by a surgeon during resuscitation.
The important detail is that the gesture was allegedly made silently. The patient wasn't supposed to be able to see it from their position in bed, and the gesture wasn't something that would necessarily have been explained afterward.
Why is that interesting?
Because it reduces some ordinary explanations. A patient might overhear doctors discussing a procedure, learn what happened later, and incorporate the information into a dreamlike memory. But a specific gesture that nobody talked about is harder to explain that way.
Still, the crucial question remains: How do we know the patient described the gesture before learning about it?
If the original account was recorded promptly, and the surgeon independently confirmed the detail, the evidence would be stronger. If the patient told the story much later, after conversations with the medical team, the possibility of memory reconstruction becomes more difficult to rule out.
This is a recurring theme in the paper. The most valuable details are unusual, specific, and independently confirmed.
### 4\. The patient who supposedly knew what doctors were thinking
Holden includes reports in which an NDE patient allegedly described the unspoken thoughts of a medical professional who was trying to revive them.
This is a more ambitious claim than seeing a physical object.
If someone correctly describes a doctor's private thoughts, the question is whether they somehow perceived information that wasn't communicated through ordinary speech or behavior.
But this type of evidence has an extra difficulty: How can we verify that someone accurately reported another person's private thoughts?
A doctor may later recognize a description as matching what they remember thinking. That is worth considering, but people can also reinterpret their memories in light of a compelling story.
A stronger test would involve the doctor recording their thoughts or observations independently before hearing the patient's account, followed by a comparison of the two records.
Holden's paper reports these cases as part of the broader collection. It does not provide enough detail about each individual case to judge how well that stronger standard was met.
### 5\. The patient who described a conversation happening somewhere else
The paper also mentions a case in which an NDE patient reportedly described a conversation taking place at a considerable distance from their body during resuscitation.
This is interesting because the patient allegedly acquired information from somewhere other than the immediate area around their body.
For example, if the person were unconscious in one room but later accurately described a conversation in another room, the obvious question would be how they learned about it.
To establish that the information was genuinely anomalous, researchers would need to show that:
* The conversation actually happened as described.
* The patient had no ordinary opportunity to hear it.
* The patient's account was recorded before the conversation was disclosed to them.
* The details were specific enough that they couldn't easily be guessed.
The paper lists this kind of case among the reports collected in The Self Does Not Die. But, as with the other examples, the strength of the evidence depends on the original documentation, not simply on the summary.
### 6\. The doctor who lost his watch
Another case involves a patient who reportedly identified the location of a watch that a doctor had lost during resuscitation.
This is a useful example because it involves an ordinary, concrete fact rather than a spiritual vision.
Imagine being unconscious and later telling a doctor where a missing object was located. If the doctor independently confirms that the object really was there, and you couldn't have learned its location through normal means, that would be unusual.
But we would still want to know whether the patient had any opportunity to see or hear information about the watch before making the claim.
This is why careful case documentation matters so much. A story can be sincere and accurately remembered by everyone involved without establishing that consciousness literally left the body.
### 7\. What did Holden actually do with the scientific evidence?
This is where the paper goes beyond storytelling. Holden describes several different approaches to studying these reports.
### A. She collected 107 published cases
Holden says that in an earlier research project, published in 2009, she gathered 107 cases of supposedly veridical perception (perception that matched real events) from the professional literature.
She sorted them according to whether the reported perceptions were accurate and how they were verified.
Her reported findings were:
### Holden's review of 107 cases
Reported percentages from her review; these are not the results of a randomized experiment.
Completely accurate, objectively corroborated
### 37%
Completely accurate, subjectively corroborated
### 55%
Some errors
### 6%
Completely erroneous
### Less than 2%
The distinction between the first two categories is important.
* Objectively corroborated means the report was checked against evidence such as medical records or testimony from someone other than the experiencer.
* Subjectively corroborated means the report was supported by the experiencer's own account of checking it or by information reported through the experiencer, rather than by the same level of independent documentation.
Holden interprets the findings as evidence that these experiences are predominantly accurate.
That is an important result if the cases are representative and the classifications are reliable. But there is a major limitation: this was a review of cases that had already been reported in the literature, not a random sample of everyone who experienced an NDE.
Researchers might be more likely to publish remarkable successes than ordinary failures. This is called the file-drawer problem: disappointing or negative results may remain unpublished while striking positive results get attention.
Holden argues that the problem is unlikely to account for the whole pattern, partly because some researchers were conducting prospective studies and had reasons to report negative findings. That is a reasonable point to consider, but it does not eliminate the concern entirely.
### B. Researchers tried hidden pictures in hospitals
This is one of the most important scientific approaches because it attempts to test the claim directly.
Researchers placed pictures or other visual targets in locations that a person lying in bed normally could not see, but that might be visible from a viewpoint near the ceiling.
The idea was simple:
* A patient experiences cardiac arrest and is resuscitated.
* If the patient experiences an OBE and can see the room from above, they might see the hidden target.
* After recovering, the patient is asked what they saw.
* Researchers check whether the person correctly identifies the target.
This is much stronger in principle than relying on a memory of something that happened during a medical emergency. The experiment sets up a test in advance, so investigators know what the correct answer is before the patient reports anything.
Holden discusses seven hospital studies, including studies by Penny Sartori, Bruce Greyson and Sam Parnia. None of these studies successfully demonstrated that a patient had identified the hidden visual target.
Holden suggests several reasons the experiments might have failed: very few patients survive cardiac arrest and are able to complete interviews, NDEs themselves are uncommon, and the targets might not attract the patient's attention.
Those are legitimate challenges for designing a study. But they also mean the hypothesis has not yet passed this direct test.
### C. The AWARE II study
The paper discusses the AWARE II study, led by Sam Parnia and colleagues, which involved 567 in-hospital cardiac arrests across 25 hospitals.
Of the 567 cases, 53 patients survived, and 28 completed interviews. Six reported memories or experiences associated with death or an NDE.
None identified the hidden visual target. One identified an auditory stimulus, but the result did not definitively establish that the information was acquired through an out-of-body experience.
This is an important finding because the study was specifically designed to investigate awareness during cardiac arrest under hospital conditions.
It doesn't prove that OBEs are impossible. The number of people who survive and can be interviewed is small, and there are practical difficulties in determining exactly when an experience occurred.
But we shouldn't treat the study's lack of a successful hidden-target identification as if it were positive proof of consciousness outside the brain, either.
### 8\. The biggest scientific question: Can someone be conscious when the brain isn't working?
This is the heart of Holden's argument.
She says the most convincing cases involve people who report accurate perceptions more than 30 seconds into cardiac arrest, when an EEG would ordinarily be expected to show no detectable brain activity.
An EEG measures electrical activity from the brain's surface. If it shows no detectable activity, that is evidence that the brain is not producing the usual measurable patterns of electrical activity.
But there's a distinction worth understanding.
No detectable EEG activity is not the same as proof that every part of the brain has stopped functioning. An EEG has limitations. It cannot measure every neuron, every deep-brain structure, or every possible process that might contribute to consciousness. And cardiac arrest is not the same as irreversible brain death.
There is another problem: even if a patient has no measurable brain activity during part of resuscitation, researchers must establish that the reported experience actually occurred during that interval. A person might experience something before losing consciousness or during recovery, then remember it as one continuous experience.
Holden's argument is that some accounts appear to overcome these difficulties because they include accurate, unusual details that the patient shouldn't have been able to perceive normally.
Her interpretation is that consciousness may sometimes function independently of the brain.
That's a possible interpretation of the reports, but it isn't the only one. The evidence would be considerably stronger if a study could establish the timing of an experience, independently verify its details, and rule out ordinary information pathways.
### 9\. So, is this good evidence for life after death?
Here's how I'd put it to an ordinary person over a cup of coffee.
Suppose someone tells you they floated above their body during surgery and saw something unusual. You might reasonably think it was a dream or hallucination.
But then suppose they tell you about a peculiar object, an unusual gesture, or an event in another room—and a doctor independently confirms the details.
Now you have a more interesting question. You don't have to believe in an afterlife to recognize that the report deserves investigation.
That's the real strength of the cases Holden discusses. Some accounts appear to contain information that deserves a better explanation than simply waving them away as meaningless dreams.
At the same time, we need to be careful not to leap from an unexplained observation to a particular explanation.
* What is reasonably well established: People have vivid out-of-body experiences, including during medical emergencies.
* What some reports suggest: Certain people may have acquired accurate information under circumstances in which ordinary perception seems unlikely.
* What remains unproven: That consciousness literally leaves the body, operates without any functioning brain processes, or survives irreversible death.
Holden believes the cumulative evidence is strong enough to overturn the view that consciousness depends entirely on the brain. I think that conclusion goes further than the evidence currently warrants. Her case collection is worth examining, but retrospective reports and independent testimony are not a substitute for consistently successful, controlled experiments.
The failed hidden-target studies are especially important here. They don't settle the matter against an afterlife, but they remind us that the most direct scientific tests have not yet delivered the result that would make the case compelling.
My bottom line: I wouldn't dismiss this research. The best cases raise a genuine question about consciousness that deserves serious study. But I would distinguish being impressed by the evidence from claiming that science has proved an afterlife.
And from a spiritual perspective, I think there's room to remain open to the possibility that consciousness is more than we presently understand without pretending that every difficult case has already been solved.
