How long the brain survives after death

 How long the brain survives after death

 Doctors have recently found scientific evidence that the brain can continue to function after the patient has died.
A patient showed continuous brain activity for 10 minutes after his heart stopped, and doctors recorded brain waves from those that people usually get during deep sleep. Doctors in an intensive care unit at a Canadian hospital described the case as “unusual and have no explanation”.

 How long the brain survives after death

How many minutes does the human brain live after death?
Researchers from the University of Western Ontario in Canada assessed the electrical impulses in the brain, in relation to the heartbeats of a number of people, after lifting life-saving devices, according to the newspaper "Daily Mail" Britain.
In 3 of the 4 cases examined, brain dementia had already stopped the heart. However, in one of the cases, the patient's brain continued to function after cardiac arrest. "In one patient, delta bursts, electrical pulses of less than 6 hertz, continued after the heartbeat and arterial blood pressure stopped," the researchers said. There were significant differences in electrical activity in the brain between 30 minutes before cardiac arrest and 5 minutes thereafter.
Brain activity
Brain activity
"It is difficult to assume that there is a physiological basis for this activity in the brain, since it occurs long after the loss of blood circulation," said the paper, published at the National Center for Biotechnology Information.
By examining the four patients, the brain recordings were very different, indicating that we all feel death in unique ways. The experience raises difficult questions about whether someone has died, and therefore when it is medically and morally correct to use the organs of the deceased to donate.
At least 20% of people who survived heart failure admit they had a "non-mundane experience" while they were clinically dead. However, scientists say it is far too early to talk about what a post-death experience might mean, especially given that it was a single patient, according to Science Alert.
In 2013, a similar phenomenon was investigated in experiments in mice whose hearts stopped. The research, published in the Journal of the National Academy of Sciences, revealed that the mice showed a "barrage of brain activity for one minute," after cutting off their heads. This type of activity is similar to that seen when these animals were fully conscious, except for signals that are eight times stronger. The researchers said the discovery that the brain is very active in the seconds after cardiac arrest indicates that the phenomenon is physical rather than spiritual.