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Scientists Restore Some Function In The Brains Of Dead Pigs

The cells regained a startling amount of function, but the brains didn't have activity linked with consciousness. Ethicists see challenges to assumptions about the irreversible nature of brain death.
The image on the left shows the brains of pigs that were untreated for 10 hours after death, with neurons appearing as green, astrocytes as red and cell nuclei as blue. The image on the right shows cells in the same area of brains that, four hours after death, were hooked up to a system that the Yale University researchers call Brain<em>Ex</em>.

The brains of dead pigs have been somewhat revived by scientists hours after the animals were killed in a slaughterhouse.

The Yale University research team is careful to say that none of the brains regained the kind of organized electrical activity associated with consciousness or awareness. Still, the experiment described Wednesday in the journal Nature showed that a surprising amount of cellular function was either preserved or restored.

The implications of this study have staggered ethicists, as they contemplate how this research should move forward and how it fits into the current understanding of what separates the living from the dead.

"It was mind-blowing," says , who studies the ethics of emerging technologies at Duke Law School. "My initial reaction was pretty shocked. It's a groundbreaking

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