Neural stem cell is characterized as an undifferentiated cell that originates from the neuroectoderm and has the capacity both to perpetually self-renew without differentiating and to generate multiple types of lineage-restricted progenitors. [ http://www.ncbi.nlm.nih.gov/pubmed/15247488 MESH:D058953 http://en.wikipedia.org/wiki/Neural_stem_cell GOC:tfm ]