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人们一直认为人脑内的神经细胞是终生存活的 ,如遇损伤 ,脑内失去神经细胞的现象也是永久性的 ,失去的神经细胞只能由胶质细胞充填 ,因为成熟的神经元不会分裂。可是 ,这一传统认识现在被打破了。本世纪最后十几年来在神经生物学领域的最重要进展之一就是发现在成年脑组织内确
People always think that the nerve cells in human brain survive for a lifetime. In case of injury, the loss of nerve cells in the brain is permanent. The lost nerve cells can only be filled by glial cells because the mature neurons do not divide . However, this traditional understanding is now broken. One of the most significant advances in neurobiology in the last decade of this century was the discovery that indeed in adult brain tissue