Word: brained
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...Science is trying to solidify the brain-based theory of NDEs, which goes something like this: Survival is our most powerful instinct. When the heart stops and oxygen is cut, the brain goes into all-out defense. Torrents of neurotransmitters are randomly generated, releasing countless fragmentary images and feelings from the memory-storing temporal lobes. Perhaps the life review is the brain frantically scanning its memory banks for a way out of this crisis. The images of a bright light and tunnel could be due to impairment at the rear and sides of the brain respectively, while the euphoria...
...perhaps the strangest element of NDEs, the out-of-body experience, studies led by Swiss neuroscientist Olaf Blanke have shed light on what may be going on there. In 2002, Blanke and others reported how they were able to induce OBEs in an epilepsy patient by stimulating the brain's temporoparietal junction (TPJ), thought to play a role in self-perception. In emergencies where blood supply is cut, says Blanke, "the effects are occurring first at the TPJ, which is a classical watershed area of the brain." It's probable, he concludes, that stress in the TPJ causes the dissociation...
...until recently is an overarching theory that might explain why NDEs seem so coherent. In two articles published in Neurology, the second in March, a team of University of Kentucky researchers led by Nelson proposed that NDEs occur in a dream-like state brought on when crisis in the brain trips a predisposition to a type of sleep disorder. It's an hypothesis that's quickly gathered heavyweight support: "I think Dr. Nelson's REM-intrusion theory to explain NDEs is the actual physiologic explanation," says Minnesota sleep expert Mahowald...
...what theory? REM (rapid eye movement) sleep is the relatively active brain state in which most dreaming is thought to occur. REM intrusion is a disorder in which the sleeping person's mind wakes up before his body does. He feels awake, yet the muscle paralysis of REM can remain; he may also hallucinate until mind and body get back in sync. "Lay people think you're either awake or asleep," says Nelson, "but you needn't go directly from one to the other...
...second. Nelson postulates that both REM intrusion and NDE involve a glitch in the arousal system that causes some people to experience blended states of consciousness. He stresses that he doesn't consider NDEs to be dreams, rather that the NDEr "engages through the REM mechanism regions of the brain that are also engaged during dreaming" - regions that infuse both dreams and NDEs with emotion, memories and images...