Neural Stem Cell Transplantation Improves Spatial Learning and Memory via Neuronal Regeneration in Amyloid-{beta} Precursor Protein/presenilin 1/tau Triple Transgenic Mice … View this article: Neural Stem Cell Transplantation Improves Spatial Learning and Memory via Neuronal Regeneration in Amyloid-beta Precursor Protein/presenilin 1/tau Triple Transgenic Mice