ABSTRACT
Neurogenesis was considered to be limited to embryonic life and to early postnatal stages. However, in recent years, it has been demonstrated that this phenomenon occurs throughout mammalian life (Alvarez-Buylla and Garcia-Verdugo 2002). It has also been shown that neurogenesis is maintained in spatiotemporally restricted microenvironments called neurogenic niches (Luskin 1993, Stenman et al. 2003, Tucker et al. 2006, Riquelme et al. 2008).
