FIGURE 3.

The index of acquisition (A) and the savings index (B) for latency to find the platform during spatial learning in male and female rats of early (P26-34) and late (P45-53) age groups. The data are: Mean (±SEM) latency differences between the first and last training trials of each of the five training days of spatial learning (A). Mean (±SEM) latency differences between the last training trial of a given day and the first training trial of the next day during the five-day spatial learning (B). Both indices illustrate a decrease of latency to find the platform with age in Control rats; neonatal formalin-induced pain leveled the age differences. ^∗p < 0.05 Formalin vs Control (A,B); ⁺p < 0.05 Control P45-49 rats vs Control P26-34 rats (A,B). The number of the rats in the groups corresponds to the number of rats in Figures 1, 2.