Rate of adult neurogenesis modulated by array of exogenous and endogenous factors (PMID: 8604047, PMID: 9087407, PMID: 9294224, PMID: 11602648). Positive factors that enhances the neurogenesis includes running, exercise (PMID: 10557337), enriched environment (PMID: 24123782,), learning (PMID: 11268214), mood stabilizers (Lithium) (PMID: 15056276, PMID: 10987856, estrogens (PMID: 10407020) and antidepressant drugs (PMID