Shown is a schematic summary of the developmental stages of dentate neurogenesis as characterized by estimated timeline for each developmental stage. Also shown are physiological properties, and expression of specific molecular markers at each stage. MCL, molecular cell layer; GCL, granule cell layer; SGZ, subgranular zone. GFAP, glial fibrillary acidic protein; BLBP, brain lipid-binding protein; DCX, doublecortin; NeuN, neuronal nuclei; PSA-NCAM: the polysialylated form of the neural cell adhesion molecule NCAM; GABA, γ-aminobutyric acid.