The poetic phrase “Life passes before your eyes before you die” could make scientific sense after an accidental discovery.
An international team of Estonian neuroscientists discovered in the brain what could explain this mystery linked to death, according to the study published in the journal Frontiers in Aging Neuroscience.
The experts analyzed the electroencephalogram (EEG) of a dying 87-year-old patient, who lost his life due to cardiac arrest, while recording his brain activity. The study revealed that the brain can remain active and coordinated during the transition to death and even after the blood flow to the organ has ceased.
“We measured 900 seconds of brain activity around the time of death and established a specific approach to investigate what happened in the 30 seconds before and after the heart stopped beating,” explains Dr. Ajmal Zemmar, a neurosurgeon at the University of Louisville. , in the USA, co-author of the study.
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The investigation showed, to their surprise, an increase in both narrowband and broadband gamma oscillations. This is a behavior similar to that recorded when entering a state of sleep or deep meditation.
“Just before and after the heart stopped working, we saw changes in a specific band of neural oscillations, the so-called gamma oscillations. But also in others, such as delta, theta, alpha and beta oscillations”, he says.
Hence the suspicion that the patient had vivid visual memories of his life, as published by La Sexta.
Ajmal Zemmar explained: “Through the generation of oscillations involved in memory retrieval, the brain could be replaying a last memory of important life events just before death.”
These brain waves are patterns of brain activity and these oscillations occur in relation to cognitive functions, such as concentration, sleep, meditation, memory retrieval, information processing and conscious perception, but also those associated with memories, explains the magazine.
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“These findings challenge our understanding of exactly when life ends and raise important further questions,” Zemmar says.
“We were able to learn that even though our loved ones have their eyes closed and are ready to go, their brains may be replaying some of the most enjoyable moments they’ve experienced in their lives.” (I)
Source: Eluniverso
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