Another common feature were extremely emotional experiences – often from somebody else’s point of view. One respondent said: “I could individually go into each person and I could feel the pain that they had in their life… “I was allowed to see that part of them and feel for myself what they felt”.
Another said: ‘I was seeing, feeling these things about him (my father), and he was sharing with me the things of his early childhood and how things were difficult for him’. Every person in the study said they were left with a new perspective on their life events and on significant people in their lives.
Researchers said that the phenomenon could be caused by the parts of the brain that store autobiographical memories like the prefrontal, medial temporal, and parietal cortices.
Those parts of the brain are not susceptible to oxygen and blood loss during serious injuries, meaning they are one of the last brain functions to suffer.
The study, published in the journal Consciousness and Cognition, concludes: “Re-experiencing one’s own life-events, so-called LRE, is a phenomenon with well-defined characteristics, and its sub-components may be also evident in healthy people.
“This suggests that a representation of life-events as a continuum exists in the cognitive system, and may be further expressed in extreme conditions of psychological and physiological stress“.
Previous studies have suggested that the phenomenon is more common among those with a high concentration of carbon dioxide in the breath and arteries following a cardiac arrest.