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Near-death experiences, in which people claim to encounter a variety of unusual phenomena, including moving through a tunnel toward light, feeling lightweight, feeling peace and joy, and profoundly spiritual moments, have often been classified by scientific researchers as a function of anoxia, or oxygen deprivation in the brain.
The mechanism by which the healthy heart and brain die rapidly in the absence of oxygen is not well understood. We performed continuous electrocardiography and electroencephalography in rats undergoing experimental asphyxia and analyzed cortical release of core neurotransmitters, changes in brain and heart electrical activity, and brain-heart connectivity. Asphyxia stimulates a robust and sustained increase of functional and effective cortical connectivity, an immediate increase in cortical release of a large set of neurotransmitters, and a delayed activation of corticocardiac functional and effective connectivity that persists until the onset of ventricular fibrillation. Blocking the brain's autonomic outflow significantly delayed terminal ventricular fibrillation and lengthened the duration of detectable cortical activities despite the continued absence of oxygen. These results demonstrate that asphyxia activates a brainstorm, which accelerates premature death of the heart and the brain.
"This study opens up avenues for studying some very complex neural processes in rodents that are more like our own than we had previously thought," said Smith. "The tools now available for studying activity in the rodent brain are improving at a remarkable pace, and the findings are even more interesting as we discover just how similar these mammalian relatives are to us.
The researchers examined neurotransmitters, changes in brain and heart electrical activity and brain-heart connectivity. They concluded, “Asphyxia stimulates a robust and sustained increase of functional and effective cortical connectivity, an immediate increase in cortical release of a large set of neurotransmitters. These results demonstrate that asphyxia activates a brainstorm, which accelerates premature death of the heart and the brain.”
A study of seven terminally ill patients found identical surges in brain activity moments before death, providing what may be physiological evidence of "out of body" experiences reported by people who survive near-death ordeals.
originally posted by: eisegesis
Quite a fascinating subject whether you believe this phenomenon to be spiritual in nature or not. Peoples experiences seem related to their specific illness and may not occur when the lungs are functioning normally before death. If you have anything at add, I would be interested in reading more on the subject.
originally posted by: StoutBroux
NDE I've done a lot of research on this subject. Your claim is false.........as in like just false.