TABLE 1.

Percentages of DCX⁺ cells age-related reduction of cortical immature neurons (present work; Figure 4A) and hippocampal adult neurogenesis (Ben Abdallah et al., 2010; see Figure 4B).

Age comparison	Piriform cortex	Dentate gyrus
1 m vs. 2 m	–	−50%
1 m vs. 3 m	−19%	−97%
1 m vs. 4 m	–	−261%
1 m vs. 5 m	−106%	−374%
1 m vs. 7 m	−394%	−1094%
1 m vs. 9 m	–	−1568%
1 m vs. 12 m	−972%	–
1 m vs. 15 m	−1560%	–

m, months; bold, comparable ages.