F Quantification of BrdU+ cells expressing β-Gal reveals biphasic activity of canonical Wnt signaling during adult hippocampal neurogenesis [0 vs. 7dpi p=0.0036, 7 vs. 28dpi p=0.0115, 7 vs. 42dpi p=0.0007] (0dpi time-point; n= 4 animals), 3dpi (n= 3 animals), 7dpi (n= 3 animals), 14dpi (n= 4 animals), 28dpi (n= 6 animals) and 42dpi (n= 6 animals). 