Is it possible to regenerate the brains of clinically dead people

When the heart stops the blood supply to the brain is quickly cut off – and in operating theatres this moment would be recorded as the official time of death. But studies show that the dead person’s mind and consciousness continue to work, at least for a short time – meaning the deceased can recognize their own death. Stem cells can remain alive in human corpses for at least 17 days after death, researchers say. Indeed there is some evidence to suggest the ‘dead person’ may even hear their own death being announced as they lie on the operating theatre table. Stem cells are self-renewing, undifferentiated, non-committed, primitive cells till they receive a signal to develop into specialized cells, a stem cell cannot work with its neighbour to pump blood nor it can carry oxygen but it can differentiate into those cells that does this function. Stem cells have the remarkable potential to develop into many different cell types in the body during early life and growth in addition in many tissues they serve as a sort of internal repair system, dividing essentially without limit to replenish other cell as long as the person or animal is still alive. When a stem cell divides each new cell has the potential either to remain a stem cell or become another type of cell with a more specialized function, such as a muscle, a red blood cell or a brain cell. Research on stem cells continues to advance knowledge about how an organism develops from a single cell and how healthy cells replace damaged cells in adult organisms. Stem cell research is one of the most of the fascinating areas of contemporary biology, but as with many expanding fields of scientific inquiry, research on stem cells raises scientific questions as rapidly as it generates new discoveries.