Scientists restore brain circulation and some cell activity in pigs' brains hours after the animals died in a slaughterhouse. - NBCNewsMACH
In a radical experiment that has some experts questioning what it means to be"alive," scientists have restored brain circulation and some cell activity in pigs' brains hours after the animals died in a slaughterhouse.
"The main implication of this finding is that … cell death in the brain occurs across a longer time window that we previously thought," Sestan said during a news conference yesterday. Rather than happening over a course of seconds or minutes after death,"we are showing that … [it's] a gradual, stepwise process," and that in some cases, the cell death processes can be postponed or even reversed, Sestan said.
Using BrainEx, the researchers studied 32 postmortem pig brains that were obtained from a pork-processing facility . The brains were placed in the BrainEx system four hours after the pigs' death, and were allowed to"perfuse" with the synthetic blood substitute for six hours. What's more, if any type of organized electrical activity — the kind needed for consciousness — had appeared, the researchers were prepared to take action to stop that activity by using anesthesia and lowering brain temperature, said study co-author Stephen Latham, director of Yale's Interdisciplinary Center for Bioethics. In other words, terminating the experiment if this happened.
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