Scientists have managed to partially revive the brain-dead pigs — and this sensation
Typically, the neurons begin to die within minutes of oxygen deprivation.
18 APR 2019 20:13
A team of neuroscientists at Yale University were able to “revive” the pig brain four hours after the death of the animal. This is a huge breakthrough in medicine and science: at the present time resuscitation stopped after a few minutes after the heart stops, because this time is not viable neurons are deprived of oxygen.
For experiments was taken as the remains of pigs, obtained at the butcher’s. The University agreed to receive about 300 severed heads, and then began experiments with the brain.
Most of the material already showed no electrical activity: this is considered a sign of lack of consciousness and death. But considering the neurons individually, the researchers found weak activity is possible to compare with “gray zone” between life and death. 32 the most active from this point of view, the brain was placed in the apparatus BrainEx system simulating the work of the body. The machine is pumping synthetic blood substitute, delivering the cells oxygen, glucose and other essential nutrients.
From the time of slaughtering the animal before you can connect to BrainEx it’s been four hours and after six hours the cells are “alive”: their activity did not differ from normal. They themselves consume oxygen and sugar, releasing carbon dioxide – that is, the metabolic process starts again. A microscopic examination showed that neurons in the higher parts, the hippocampus and the anterior cortex of the hemispheres, look healthy.
The study authors emphasize that to speak about return to the brain consciousness before the coordinated activity of these brain is not shown. However, even the opportunity to return to individual cells ability to transmit a signal, ten hours after death is a great achievement. On this basis, we can find new ways of resuscitation and revise its valid time.
“The death of brain cells takes place later than we previously believed. Now we see that it is a gradual, incremental process,” study co-author and Professor of neurobiology Nenad Sestan (Nenad Sestan).
In addition, the results of the experiment to expand opportunities for research of Alzheimer’s disease and other brain lesions. Learn why the dying see the light at the end of the tunnel.