Figure 11From: Hippocampal lesions facilitate instrumental learning with delayed reinforcement but induce impulsive choice in ratsLocomotor activity in a novel environment and body mass. Hippocampal-lesioned rats were significantly hyperactive compared to sham-operated controls, in both (a) Experiment 1 (p = .003) and (b) Experiment 2 (p < .001). (c) Body mass across both experiments. There were no differences between groups preoperatively in either experiment. In Experiment 1, the groups gained weight at the same rate, but in Experiment 2, which lasted longer, the H-lesioned rats weighed less at the end of the experiment (p = .01).Back to article page