a dilerium brought on by lack of oxygen to the brain, trauma to the brain, or nervous system shock. memories, thoughts, and mental images can bring to life these experiences.

Some people believe NDE's are the brain's reaction to the body shutting down. Others believe it's the start of the soul leaving the body. But evolution has nothing to do with it. Many, many people who accept evolution also believe in a higher power and a the soul. The question would have been better asked of athiests.

1) NDE have nothing to do with evolution. SO NDE cannot be explained with evolution, the formation of life can. 2) "Research Interest in the NDE was originally spurred by the research of such pioneers as Elisabeth Kübler-Ross, George Ritchie, P.M.H. Atwater, and Raymond Moody Jr. Moody's book Life After Life, which was released in 1975, and brought a great deal of attention to the topic of NDEs. This was soon followed by the establishment of the International Association for Near-death Studies (IANDS), founded in 1978, in order to meet the needs of early researchers and those with NDE experiences within this field of research. Today the association includes researchers, health care professionals, NDE-experiencers and people close to experiencers, as well as other interested people. One of its main goals is to promote responsible and multi-disciplinary investigation of near-death and similar experiences. Later researchers, such as Bruce Greyson, Kenneth Ring and Michael Sabom, introduced the study of near-death experiences to the academic setting. The medical community has been somewhat reluctant to address the phenomenon of NDEs, and money granted for research has been relatively scarce. However, although the research was not always welcomed by the general academic community, both Greyson and Ring made significant contributions in order to increase the respectability of near-death research. Major contributions to the field include the construction of a Weighted Core Experience Index in order to measure the depth of the near-death experience, and the construction of the near-death experience scale, in order to differentiate between subjects that are more or less likely to have experienced a classical NDE. The NDE-scale also aims to differentiate between what the field claims are "true" NDEs and syndromes or stress responses that are not related to an NDE, such as the similar incidents experienced by sufferers of epilepsy. Greyson's NDE-scale was later found to fit the Rasch rating scale model. Other contributors to the research on near-death experiences come from the disciplines of medicine, psychology and psychiatry. Greyson (1997) has also brought attention to the near-death experience as a focus of clinical attention, while Morse et al. (1985; 1986) have investigated near-death experiences in a pediatric population. Neuro-biological factors in the experience have been investigated by researchers within the field of medical science and psychiatry (Mayank and Mukesh, 2004; Jansen, 1995; Thomas, 2004). Among the researchers and commentators who tend to emphasize a naturalistic and neurological base, for the experience, are the British psychologist Susan Blackmore (1993) and the founding publisher of Skeptic magazine, Michael Shermer (1998). Among the scientific and academic journals that have published, or are regularly publishing new research on the subject of NDEs, are: Journal of Near-Death Studies, Journal of Nervous and Mental Disease, British Journal of Psychology, American Journal of Disease of Children, Resuscitation, The Lancet, Death Studies, and the Journal of Advanced Nursing." 3) "Biological Analysis and Theories In the 1990s, Dr. Rick Strassman conducted research on the psychedelic drug Dimethyltryptamine (DMT) at the University of New Mexico. Strassman advanced the theory that a massive release of DMT from the pineal gland prior to death or near-death was the cause of the near-death experience phenomenon. Only two of his test subjects reported NDE-like aural or visual hallucinations, although many reported feeling as though they had entered a state similar to the classical NDE. His explanation for this was the possible lack of panic involved in the clinical setting and possible dosage differences between those administered and those encountered in actual NDE cases. All subjects in the study were also very experienced users of DMT and/or other psychedelic/entheogenic agents. Some speculators consider that if subjects without prior knowledge on the effects of DMT been used during the experiment, that it is possible more volunteers would have reported feeling as though they had experienced an NDE. Critics have argued that neurobiological models often fail to explain NDEs that result from close brushes with death, where the brain does not actually suffer physical trauma, such as a near-miss automobile accident. Such events may however have neurobiological effects caused by stress. In a new theory devised by Kinseher in 2006, the knowledge of the Sensory Autonomic System is applied in the NDE phenomenon. His theory states that the experience of looming death is an extremely strange paradox to a living organism - and therefore it will start the NDE: during the NDE, the individual becomes capable of "seeing" the brain performing a scan of the whole episodic memory (even prenatal experiences), in order to find a stored experience which is comparable to the input information of death. All these scanned and retrieved bits of information are permanently evaluated by the actual mind, as it is searching for a coping mechanism out of the potentially fatal situation. Kinseher feels this is the reason why a near-death experience is so unusual. The theory also states that out-of-body experiences, accompanied with NDEs, are an attempt by the brain to create a mental overview of the situation and the surrounding world. The brain then transforms the input from sense organs and stored experience (knowledge) into a dream-like idea about oneself and the surrounding area. Whether or not these experiences are hallucinatory, they do have a profound impact on the observer. Many psychologists not necessarily pursuing the paranormal, such as Susan Blackmore, have recognized this. These scientists are not trying to debunk the experience, so much so as searching for biological reasons that cause an NDE." Source and further information: http://en.wikipedia.org/wiki/NDE