At the end of any movie, final credits appear on the screen. Human life is much more complicated than any movie, but what do people see before the end of this “movie”?

Many people may have heard or read about how people in a borderline state experience unusual sensations. As a rule, stories are about patients in hospitals who have been in a state of clinical death—these people account for the majority of specific memories. But some of those who had suffered a heart attack also shared some specific experiences that accompanied their critical condition after their recovery.

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It is important to note that until now, scientists cannot agree on whether there is a near-death experience at all, although the scientific community generally recognizes the likelihood of astonishing human experience. Experts' opinions also differ as to what such experience can be caused by.

Scientists believe that the most mundane explanation for this kind of sensations is an overly acute reaction of the human body's receptors to insufficient supply of oxygen to brain tissues. As a result, auditory and visual receptors can produce certain effects such as sounds and flashes of light, which are considered as signs of imminent death.

Another version is a spurt of electrical activity in the brain, which occurs in a near-death situation. American scientific testing on rodents confirmed this hypothesis—a surge of highly synchronized brain activity was recorded instrumentally. According to researchers, similar body changes may well be observed in people, which explains the significant peak of neurophysiological activity of the brain in a terminal state, which may even exceed it during normal life. At least, such a change in human brain in the situation of cardiac arrest has been observed and documented.

Another relatively well-known and described cause of near-death experience is residual brain activity after the heart stops. In this situation, brain demonstrates increased activity, the level of dopamine and serotonin grows, and, as a result, visual and other hallucinations appear. Patients often have an increased level of carbon dioxide in the urine and a reduced level of potassium, which, along with the increased level of exogenous or endogenous psychoactive substances in human body, can be an explanation for such impressions.

Life After Death A Response to the Most Common Criticisms of Near Death

There are also mystical explanations for such experience. The general idea is that unusual sensations in borderline states prove the existence of life after death. And the difference in the nature of such sensations is caused by the fact that each person has a unique life experience.

One of the most recent studies conducted by the Center for Hospice and Palliative Care in Buffalo demonstrated that, in addition to the bright light and sense of peace before death, people can see bright and clear dreams in which they meet their relatives and loved ones (living or dead), prepare for a journey or start the journey, as well as recall pleasant moments from their lives. The reasons for the appearance of such dreams, which begin to be recorded 10-11 weeks before death, experts are not yet able to explain.

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