Life-long neurogenesis is a characteristic feature of many vertebrate and invertebrate species. are influenced by environmental factors (Sandeman and Sandeman 2000 Ayub et al. 2011 seasonality (Hansen and Schmidt 2004 and time of day (Goergen et al. 2002 Endogenous signals such as serotonin and nitric oxide play important roles in regulating the numbers of labeled… Continue reading Life-long neurogenesis is a characteristic feature of many vertebrate and invertebrate