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One of the big questions in life is what will happen when we die. Will we see a bright white light? Will our life blink before our eyes?
According to some recent research, the reality is much more terrifying.
The study suggested that when our heart stops, our brain will continue to function for a while, leaving us essentially trapped in our own body.
Dr. Sam Parnia, of the Stony Brook University School of Medicine, examines consciousness after death by examining cases of cardiac arrest in Europe and the United States.
He added that there is anecdotal evidence that survivors of cardiac arrest could hear what was going on around them while they were "dead" before they died. to be "brought back to life".
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Dr. Parnia told LiveScience: "They will describe watching doctors and nurses work, they will describe being aware of whole conversations, visual things going on, that otherwise would not be known to them."
Even more terrifying than that, some evidence suggests that people have even heard themselves being told dead by doctors.
In the medical field, the time of death is usually calculated when the heart stops.
When this happens, our brain function stops "almost instantly," Dr. Parnia said.
He says that the cerebral cortex of his brain, the "reflexive part," also slows down work and flat lines, but that brain cells can remain active for hours after stopping the heart.
Performing a CPR on a person whose heart has stopped will send about 50% of the blood he needs to the brain, which, according to Dr. Parnia, is enough to revive his duties.
He added: "If you manage to restart the heart, what is trying to do CPR, you will gradually start to operate the brain.
"The longer you have been performing CPR, the pathways of brain brain death continue – they occur at a slightly slower pace."
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