动物造模 z-bo 2022-11-14 377

　　In a controversial experiment, the brain and body of the pig did not die immediately after separation. This is the first time a scientist has done this. Researchers say that hundreds of pig brains survived as long as 36 hours after being "decapitated."

　　This bold experiment laid the foundation for brain transplantation. In the future, after the human body dies, the brain can be connected to an artificial system to achieve "immortality". Dr. Nena Docestan, head of the Yale University research team, introduced his experimental methods at the National Institutes of Health meeting.

　　Researchers successfully removed 100 to 200 pig heads to prevent pig brains from dying in the process.

　　Scientists connect the brains of these pigs to a closed loop system called "BrainEX", which can send oxygen-rich artificial blood to the organs to maintain life. Cestan's "unbelievable" and "accidental" refer to the billions of cells in the pig brain that have died and are very healthy. According to "Technical MIT Technology Review," Sestan told the National Institutes of Health that the lifespan of the brain can be maintained indefinitely and more steps are needed to restore brain consciousness. I'm. "This is uncharted territory,"

　　Sestan said that his team would not try this. Chemicals added to prevent swelling during the experiment will interfere with unlimited recovery of consciousness.

　　This means that with current experimental methods, Setin's team cannot restore the "thinking" brain. according to

　　Cestin said that the pig brain used in the experiment must have died and lost consciousness. "The animal's brain is unconscious. I am very confident about it."

　　Previous research has shown that the brains of many mammals do not die when the head leaves the body.

　　In 1928, Soviet researchers separated the dog’s head from the body and connected the main blood vessels to the cardiovascular system. No part of the brain died.

　　In 1993, researchers at New York University allowed the brains of guinea pigs to survive in a special fluid for several days.

　　But this new study is the first time that pig brain has survived in vitro. This experiment is very important because pig brains are surprisingly similar to human brains in terms of operation. Technically, Dr. Steve Hyman, a brain researcher at the Broad Institute in Cambridge, Massachusetts, said the pig brain used in this study was "alive." Hyman told the MIT Science and Technology Review: “The brains of these pigs may be damaged, but if the cells survive, the organs can survive.” Hyman said that new research has made significant progress. But transplanting the brain to another body is still "out of reach."