Figure 8.

Mean z scores based on data from four measures of memory (47) for ten normal monkeys (N), five monkeys with surgical aspiration lesions of the parahippocampal cortex (the PH lesion; cortical areas TH and TF; ref. 52), four monkeys with surgical stereotaxic damage limited to the hippocampal region (H; dentate gyrus, the cell fields of the hippocampus, and the subicular complex), and five monkeys with surgical aspiration lesions of perirhinal cortex (PR; cortical areas 35 and 36; ref. 53). The PR group was impaired relative to the N, PH, and H groups. The PH group was not impaired (51). Error bars indicate standard errors of the mean.