Table 1.

A comparison of brain regions where constitutive adult neurogenesis occurs in vertebrates (see text for references). (+, regions with well-documented constitutive neurogenesis; (+), regions where neurogenesis have been reported occasionally or been induced experimentally; −, region lacking documented adult neurogenesis.)

	mammals	birds	reptiles	amphibians	teleost fish
olfactory bulb	(+)	−	+	−	+
telencephalon
ventral telencephalon/subpallium/SVZ	+	+	+	+	+
dorsal telencephalon/medial pallium/hippocampus	+	+	+	+	+
diencephalons
preoptic region	−	−	−	+	+
epithalamus, habenula	−	−	−	−	+
thalamus	−	−	−	+	+
hypothalamus	−	(+)	−	+	+
pretectum	−	−	−	−	+
mesencephalon and rhombencephalon and spinal cord
tectum	−		−	+	+
cerebellum	(+)	−	+	+	+
midbrain	(+)	−	−	+	+
vagal complex	(+)	−	−	−	+
spinal cord	(+)	−	−	−	+