Rats with bilateral lesions of dorsal hippocampus and normal animals were trained to bar-press on cued-DRL-15sec schedule of reinforcement following seven days of pretraining on CRF schedule. They were then trained to bar-press on DRL-15sec schedule.
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Rats with bilateral lesions of dorsal hippocampus and normal animals were trained to bar-press on cued-DRL-15sec schedule of reinforcement following seven days of pretraining on CRF schedule. They were then trained to bar-press on DRL-15sec schedule.
No differences were found on the cued-DRL performance between the hippocampal and normal group. But, the DRL performance of the normal group was better than that of the hippocampals. The total bar-pressing of initial days on cued-DRL and DRL was significantly different between the two groups.
These results suggest that hippocampus is involved in the processing of temporal information. Also, rats with hippocampal damage are especially susceptible to interference.