Patients who have experienced clinical death often report seeing bright flashes of light and a dark tunnel. This subject has attracted the attention of scientists from all over the world, and many studies have been conducted on this phenomenon. One of the latest studies by American specialists was presented on the moyzhurnal portal.
When the heart stops beating, the blood supply to the brain ceases, leading to irreversible consequences due to lack of oxygen, writes pravda.ru. As a result, the cortex of the brain begins to deteriorate, and a person loses consciousness. Even “intensive” resuscitation measures are unable to correct this situation.
Sam Parnia, an American scientist from New York University, has conducted several studies on the phenomenon of death and the possibilities of resuscitation. His work has shown that after the confirmation of death, a person’s consciousness can be preserved for another 20 seconds.
The cerebral cortex can continue to function after the heart stops by sending electrical signals. This short period of time provides an opportunity for a person to return to life.
It is known from medical practice that the body can restore its functions after death (cardiac arrest) within 3-6 minutes. After clinical death, the electrical activity of the brain gradually decreases. Some parts die, but others continue to function.
However, even after successful resuscitation, central nervous system function may be compromised, leading to loss of thinking, walking, speaking, and other abilities.
American researchers made a sensational discovery: after clinical death, human life can be maintained for up to 12 hours. In an experiment using an artificial blood circulation system on the pig brain, scientists found that after oxygen and nutrients penetrate the dead tissues, the brain shows signs of activity.
Nerve cells responded to stimuli, and weak electrical impulses and immune system responses were recorded. Signs of activity in brain structures were observed not only after 12 hours but also during 1.5 days of the study.
