Scientists say that the brain of animals and humans can risk serious damage without blood flow and oxygen. Researchers say they were able to restore some activity in the brains of four-hour-old pigs.
Nenad Sestan of the Yale School of Medicine at New Haven, Connecticut, was among the researchers. According to medical definitions, the brains are not "living brains". He added that the brains could not think or feel anything. However, the researchers found that cells in brains that have lost their supply of blood and oxygen could survive longer than scientists had thought.
They said the research could lead to new medical treatments for stroke and other medical conditions. It also provides a new way to study the brain and how drugs work in it.
The research was mainly supported by the National Institutes of Health and published this week in the journal Nature.