Table 2.

Critical periods in the development of the cerebellum. Time periods represent approximate dates related to onset of neurogenesis, function and formation of structure. Time periods are approximated as days post-fertilization (dpf).

Developmental Event	Estimated Onset of Development (dpf)
	Rat [112]	Zebrafish [109,113,119]
Cerebellar primordia (En1/2, Wnt1, Pax2, Gbx2)	12.5	0.8
Progenitor pools specified (Atoh1a/Ptf1a)	10.5	1–2
GC/PC migration-differentiation	12.5–15	3
Purkinje cells functionally mature	29.5 [120]	4
Trilaminar structure formed	35–42	5