Figures & data
Figure 1. Experimental timeline (top) and groups (bottom). One-month-old rats were exposed to their home cages, a laboratory room or a laboratory room with a cat for 30 min (Manipulation 1). Five weeks later, rats learned to locate a hidden platform in the RAWM; 24 h later, the rats either remained in their home cages or were exposed to the laboratory room for 30 min (Manipulation 2). Exposure to the laboratory room served as a reminder of the stressor for rats previously exposed to the room with a cat; 30 min after Manipulation 2, the rats were given a long-term memory test trial in the RAWM. Experimental groups are outlined below the timeline. Male (M) and female (F) rats were tested.
![Figure 1. Experimental timeline (top) and groups (bottom). One-month-old rats were exposed to their home cages, a laboratory room or a laboratory room with a cat for 30 min (Manipulation 1). Five weeks later, rats learned to locate a hidden platform in the RAWM; 24 h later, the rats either remained in their home cages or were exposed to the laboratory room for 30 min (Manipulation 2). Exposure to the laboratory room served as a reminder of the stressor for rats previously exposed to the room with a cat; 30 min after Manipulation 2, the rats were given a long-term memory test trial in the RAWM. Experimental groups are outlined below the timeline. Male (M) and female (F) rats were tested.](/cms/asset/3fd6c19c-79cf-4659-9220-a832b16b2161/ists_a_791276_f0001_b.jpg)
Figure 2. Arm entry errors committed in the radial-arm water maze (RAWM) during acquisition and the short-term memory test trials in male (A; top) and female (B; bottom) rats. The groups are identified in the key by manipulations performed 5 weeks prior to training. The top panel illustrates the experimental timeline, and the box depicts the time point for data. Performance during acquisition (Trials 1–12) and the short-term memory test trials (Trials 13–18) is presented in two-trial blocks (indicated by B1–B9). All rats acquired the spatial learning task, as evidenced by a significant decrease in arm entry errors across trials (p < 0.05, ANOVA). The data are mean ± SEM. N = 8–9 rats per group.
![Figure 2. Arm entry errors committed in the radial-arm water maze (RAWM) during acquisition and the short-term memory test trials in male (A; top) and female (B; bottom) rats. The groups are identified in the key by manipulations performed 5 weeks prior to training. The top panel illustrates the experimental timeline, and the box depicts the time point for data. Performance during acquisition (Trials 1–12) and the short-term memory test trials (Trials 13–18) is presented in two-trial blocks (indicated by B1–B9). All rats acquired the spatial learning task, as evidenced by a significant decrease in arm entry errors across trials (p < 0.05, ANOVA). The data are mean ± SEM. N = 8–9 rats per group.](/cms/asset/b980bb9a-1b93-49db-b1ce-4b8cbe64b60b/ists_a_791276_f0002_b.jpg)
Figure 3. Arm entry errors committed in the radial-arm water maze (RAWM) during the 24-h long-term memory test. Below the x-axis, the groups are identified by the manipulations that were performed on them during time point 1 (i.e. 5 weeks prior to training) and time point 2 (i.e. immediately prior to water maze testing). The top panel illustrates the experimental timeline, and the box depicts the time point for the data. Female rats exposed to a cat during time point 1 and then given a reminder of that experience immediately prior to memory testing made significantly more arm entry errors than all other groups. Data are mean ± SEM. N = 8–9 rats per group. *p < 0.05 versus all other groups, Holm–Sidak post hoc test.
![Figure 3. Arm entry errors committed in the radial-arm water maze (RAWM) during the 24-h long-term memory test. Below the x-axis, the groups are identified by the manipulations that were performed on them during time point 1 (i.e. 5 weeks prior to training) and time point 2 (i.e. immediately prior to water maze testing). The top panel illustrates the experimental timeline, and the box depicts the time point for the data. Female rats exposed to a cat during time point 1 and then given a reminder of that experience immediately prior to memory testing made significantly more arm entry errors than all other groups. Data are mean ± SEM. N = 8–9 rats per group. *p < 0.05 versus all other groups, Holm–Sidak post hoc test.](/cms/asset/adb4a19d-16e2-493e-977c-7f3ec4d8489b/ists_a_791276_f0003_b.jpg)