In 1975, Raymond Moody published Life After Life, a book that gathered stories from people who were clinically dead or near death. These stories questioned the idea that consciousness only comes from brain activity. The book became a bestseller, introduced the term near-death experience (NDE), and started a field of research that, fifty years later, has collected thousands of accounts and is still widely debated in consciousness studies. Together, these stories suggest that NDEs might reveal something important about consciousness and dying.

Reports of NDEs are surprisingly similar across different cultures, languages, religions, and ages. Both religious and non-religious people describe the same main experiences, which makes it hard to explain these stories as just cultural expectations. To check this further, researchers have studied NDEs in children, since children usually have not learned many ideas about death or the afterlife. However, there are far fewer cases in children than in adults, so most of what we know comes from adult reports and only a few from children.

Most of what we know about how consistent these experiences are comes from the Greyson NDE Scale. This sixteen-question survey, created by psychiatrist Bruce Greyson in 1983, gives researchers a standard way to identify and score an NDE instead of relying on personal opinion. Most structured research, including studies on cardiac arrest, uses some version of this scale.

The Core Features

Not every NDE has all of these features, and they can look different from person to person, but the pattern is consistent enough to study. The first feature is the out-of-body experience. This means feeling like you have left your body and are watching it from outside, usually from above. Many people say they see their own body, watch medical procedures, and later describe details they could not have known from their position in the body.

  • The tunnel and the light: Many people say they move through a dark tunnel toward a bright light. This light is described as brighter than anything in normal life, but it does not hurt to look at. People often say it feels full of love, stronger than anything they have felt before. If you are familiar with Tibetan Buddhist ideas in this series, you might notice similarities with the Clear Light in the Bardo Thödol. Scholars like Carol Zaleski have written about the similarities and differences between these traditions’ descriptions of a bright encounter near death. This comparison helps us see NDEs as part of a bigger pattern of death-related images. Another common report is meeting deceased relatives: People often say they meet family members or friends who have died, sometimes even relatives they did not know or who died before they were born, later confirmed by family records.
  • The life review: This is a sweeping look at your whole life, not just a replay but seeing everything from many points of view at once. The person experiences each event from the perspective of everyone involved. People say this is deeply educational and often very humbling, because every act of cruelty or unkindness is felt from the other person’s side.
  • The border or boundary: This is the feeling of coming close to a threshold, such as a door, a body of water, or a line, beyond which return is not possible. At this point, the person either decides, is told, or feels compelled to return.

The Other Side of the Pattern

Most popular stories about NDEs, especially online, focus only on peaceful and loving experiences. But research shows this is not the whole picture. Psychiatrist Bruce Greyson and researcher Nancy Evans Bush, who helped start the International Association for Near-Death Studies (IANDS), published an important paper in 1992 that found a separate group of distressing NDEs. These are experiences that are frightening, empty, or even hellish instead of loving. Estimates of how common these are vary a lot, from about 1% in the self-reported Near-Death Experience Research Foundation (NDERF) database to about 1 in 5 in Bush’s later review of over 20 studies. This wide range suggests that distressing NDEs are often under-reported, as people may feel reluctant or ashamed to share them in a field usually seen as positive.

Including these distressing NDEs is important for a full and honest understanding of the topic. Ignoring uncomfortable findings makes the research weaker. Greyson and Bush also found that some distressing NDEs can turn peaceful, often when the person calls out for help or to God. This shows that the line between peaceful and distressing NDEs is not always clear, and it raises questions about what these experiences mean. Some explanations point to oxygen loss, endorphins, or random firing of dying neurons. While these ideas explain some parts of NDEs, others are harder to explain, like out-of-body experiences that can be verified, meeting deceased relatives unknown to the person, and the lasting effects after the event. One of the most talked-about cases is Pam Reynolds, an American woman who had a rare brain surgery in 1991. During the surgery, her body was cooled, her blood was drained, and her heart and breathing stopped, with her brain showing no activity for a time. She later described an out-of-body experience where she saw specific surgical tools and heard conversations. Her cardiologist, Michael Sabom, tried to match these details with the surgical record. The case is still debated. Critics like anaesthetist Gerald Woerlee say her experience could be explained by partial awareness before her brain fully shut down, and they note her account was not recorded until years later. Sabom and the lead surgeon, Robert Spetzler, argue that the timing and details are hard to explain this way. The case is still open to debate. Researchers have also tried to test out-of-body perceptions in controlled studies. The largest was Sam Parnia’s AWARE study, which included 2,060 patients with cardiac arrest across 15 hospitals over 4 years. They placed hidden images in resuscitation rooms to see if anyone could describe them during an NDE. Of the few survivors who could be interviewed, only one gave an accurate account, and that was based on sound, not sight. So, the main result was less dramatic than some reports suggest. However, a 2023 follow-up study found that brain activity can sometimes return up to an hour after resuscitation starts, much longer than doctors thought possible. This does not prove consciousness survives death, but it does challenge the idea that a silent brain is completely inactive.

Researchers like Pim van Lommel, who studied NDEs in cardiac arrest patients and published his results in The Lancet in 2001, believe the evidence suggests that consciousness might not be made by the brain but accessed through it. They argue that NDEs show consciousness working separately from the body, something standard neuroscience cannot explain. This idea is not proven, and the field is still debated. Still, the growing evidence from careful studies, not just personal stories, has created a set of data that some researchers think deserves more attention from mainstream neuroscience. Overall, these findings support the idea that NDEs may point to a kind of consciousness not fully explained by brain activity.

The Aftermath

What happens after an NDE is just as important as the experience itself. The effects are strong and consistent: most people lose their fear of death, become more compassionate, care less about material things, feel more meaning and purpose, and are more sensitive to beauty and the suffering of others. Many say the NDE was the most important event in their lives. The loss of fear of death stands out because it lasts. People still react normally to danger, but the deep fear of death as a total ending fades away. If you want to know more about how thinking about mortality can change your priorities, there is more on this topic in Approaching the Great Threshold, another part of this series.

NDEs strongly suggest that the life review is one of the most important parts of the experience. People who have died and those who have come back often say that love and connection are what really matter in life. According to those who have come closest to death, the fear of dying may be based more on misunderstanding than we usually think. It is also important to include the stories of those who return with darker or more difficult experiences. Taken together, these accounts point to the same conclusion: near-death experiences challenge simple ideas about death and consciousness.

This article is part of the Aether series, which looks at near-death experiences and what they can teach us about consciousness and dying.