Fig. 2.
Behavior of rats that had received either sham operations (sham) or excitotoxic lesions of the hippocampus (hippocampal) during training and testing. a, Behavior of rats in the control mismatch condition during the auditory stimuli across the 3 d of training. The mean percentages of trials on which rats correctly anticipated (correct response) or failed to anticipate (incorrect response) the spatial location in which a light was about to be presented during the terminal portion of the auditory elements of the audiovisual sequences are shown. b, Behavior of rats in the control mismatch condition and the associative mismatch condition (pooled) during the visual target stimuli across the 3 d of training. The mean percentages of trials on which the visual stimuli provoked an orienting response are shown. c, d, Mean percentages of trials on which the visual stimuli elicited an orienting response on match and mismatch test trials in c, the associative mismatch condition and d, the control mismatch condition (see Materials and Methods).