Another interesting answer was received to the question of what happens to our brain after cardiac arrest. Scientists have found that brain cells begin to turn off during a "depression" wave, but a person can be brought back to life within 5 minutes after death.

A wave of electrical activity in the brain called "spreading depression" marks the last episode in the work of this organ before death, as shown by the study. Experts studied brain activity in dying patients, fixing the last flash, which precedes the final disconnection of our most important organ in the body. The results of this study suggest that within a few minutes after cardiac arrest the human consciousness is still preserved. Consequently, the process of disabling the brain can be stopped and put in the opposite direction, writes Medikforum.

A group of German neurologists studied electrical brain signals from 9 people as they died. Each of these patients suffered fatal brain damage, while all had a refusal to resuscitate. Experts hoped that by implanting the electrodes to the brain, one can establish that mechanism and the exact time of events that precede the death itself. It turned out that even after 5 minutes after cardiac arrest, neurons of the brain can still function.

However, the wave of spreading depression marked the very final moment, after which the neurons were completely turned off, and death became irreversible. It is up to this point to provide assistance in resuscitation, which can theoretically bring back to life. Cells die when they cease to receive blood flow, thus depriving them of oxygen supply, which is necessary for their functioning by fuel.

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