Health
People in a coma displayed “consciousness-like” brain activity at the time of death, the study said.death and dying
Some feel the presence of a loved one, or hover over their own body after a near-death experience, recalling a bright light at the end of the tunnel. Scientists now say they have captured “consciousness-like” brain activity in dying patients in a discovery that gives new insight into the dying process.
“It’s a paradox in neuroscience how vivid experiences emerge from a dysfunctional brain during the dying process,” said Jimo Borjigin of the University of Michigan, who led the study. I saw nerve signs.”
The study used data from four patients who died in hospital while their brains were monitored using electroencephalography because they had previously suspected seizures. All four patients were comatose and unresponsive and were considered without medical help.With the permission of their families, life support was withdrawn and they subsequently went into cardiac arrest and died.
Scientists retrospectively analyzed brain activity data from the time life support was removed until the patient died. When ventilator support was removed, two of her patients showed an increase in heart rate along with a surge in gamma wave activity.
This may correspond to the patient being “internally awakened,” Borjigin suggested.
Activity was detected in the so-called hot zone, a region in the back of the brain associated with conscious brain activity. This region correlates with dreams, hallucinations in epilepsy, and altered states of consciousness in other brain studies.
Two other patients did not show the same increase in heart rate or brain activity, according to a study published in . Proceedings of the National Academy of Sciences.
Scientists say it’s impossible to know exactly what brain activity corresponds to as a subjective experience.
“It could be activating a secret inner consciousness and eliciting past memories. It could be a survival mechanism in the brain, but we don’t know,” Borjigin said. increase.
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