A comparison between the effects of medial septal lesions and entorhinal cortex lesions on performance of nonspatial working memory tasks and reversal learning.

Rats with either electrolytic medial septal lesions or cytotoxic entorhinal lesions were compared to unoperated controls on a series of delayed matching-to-sample (DMS) tasks. A DMS trial consisted of two runs. In the first (information) run, the subject was familiarized with a sample discriminandum...