People are aware that they are dead. The brain continues to function even after the body stops to show the signs of life like when the heart stops beating.
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‘Brain functions do not cease immediately after the heart stops beating, and that is how people are aware of their death.’
Dr. Sam Parnia is the director of critical care and resuscitation research at NYU Langone School of Medicine in New York City. He and his team observed people who had a cardiac arrest, i.e., Who were technically dead, but then were later resuscitated back to life. The study was published in the issue of the journal Resuscitation.
Some of the participants who were pronounced dead were fully aware of the conversations going on around them, and could also see things clearly, reveals the research team.
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Death is defined as the time when the heart no longer beats, and blood flow to the brain is completely cut off.
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“Technically, that's how you get the time of death, it's all based on the moment when the heart stops, where the brain functions stop, and the individual loses their brain stem reflexes including gag reflex, pupil reflex,” said Dr. Sam Parnia.
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In 2013, the electrical signals inside the brain’s of about nine anesthetized rats who had an induced heart attack were studied by the research team at the University of Michigan.
The research team examined the activity patterns that were linked to a “hyper-alerted state” in the brief period after clinical death.
Dr Parnia said: "In the same way that a group of researchers might be studying the qualitative nature of the human experience of 'love', for instance, we're trying to understand the exact features that people experience when they go through death, because we understand that this is going to reflect the universal experience we're all going to have when we die."
Source-Eurekalert
