Neural Stem Cells (NSCs) are multipotent stem cells that can differentiate into many cell types of the neural system, including neurons, astrocytes, oligodendrocytes and etc. NSCs have been isolated from various areas of the adult brain, and non-neurogenic areas, such as the spinal cord. NSCs are able to rebuild functional neural circuits, offering a potential cure for brain tissue impairments, and have being widely studied in animal models for treating neural degenerative diseases, hereditary central nervous system diseases, stroke and spinal cord injuries.