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. 2011 Aug;61(4):366–377.

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Figure 3. — Effects of reproductive experience on the acquisition of reference memory in middle-aged nulliparous (n = 9, dashed lines) and primiparous (n = 8, continuous lines) female rats along 19 training sessions. (A) Latency to find the platform (s). (B) Path length (cm). (C) Swim speed (cm/s). (D) Heading angle relative to platform location (degrees). (E) Number of entries within the training counter. (F) Percentage of time spent within the training quadrant (G) Percentage of time spent within the inner ring. (H) Percentage of time spent within the intermediate ring. (I) Percentage of time spent within the outer ring. (J) Percentage of time spent within the training counter. Data are expressed as mean ± SEM of 4 trials per day for each group. *, Significant (P < 0.05) difference between groups.