Fig. 5.

Rimonabant eliminates prior trial effects on hippocampal ensemble firing and associated S_mR code strength. Color contour firing maps (perievent histograms) of ensemble firing patterns for a single animal similar to those shown in Fig. 1a. The influence of prior trial type (same vs diff) and prior trial delay (short vs long) on ensemble firing in vehicle sessions (vehicle A and B) was eliminated in rimonabant sessions (rimonabant C and D). On the vertical axis of the contour maps are listed the individual neurons in the ensemble; the horizontal axis shows time (±1.5 s) relative to occurrence of the S_mR (0.0 s). Firing rate is shown in 250 ms bins and reflected by the color scale: blue ≤1 Hz to red ≥10 Hz