摘要: The discovery of stem cells that can generate neural tissue has raised new possibilities for repairing the nervous system. A rush papers proclaiming adult cell plasticity fostered notion there is essentially one type that, with right impetus, create whatever progeny our heart, liver or other vital organ desires. But studies aimed at understanding role during development have led to a different view - are restricted regionally and temporally, thus not all equivalent. Can these views be reconciled?