Figure 6.

Level of extinction is not correlated with total number of BrdU+ cells. (A) and (B) Level of extinction is not correlated with total number of BrdU+ cells. Data in Figs. 4D and 5C were reanalyzed to examine the correlation between the level of extinction and the level of hippocampal neurogenesis. Level of extinction was calculated by (R – the first freezing)/R × 100% in case of (A), (the first freezing – the seventh freezing)/the first freezing × 100% in case of (B). Dentate gyrus (D.G).