(A) Mean running speed and number of laps per trajectory in Track sessions of first two days (Day1, Day2) for the Trained-demo (N = 9) and Empty-track (N = 5) rats. Both parameters were significantly different between Day1 and Day2 (mean speed: F1,27 = 5.3, p=0.03; number of laps: F1,27 = 4.6, p=0.04; Two-way ANOVA). Trained-demo had significantly faster mean speed (F1,27 = 14, p=0.001) and ran more number of laps (F1,27 = 12, p=0.002). (B) Example place cells from a Trained-demo and an Empty-track rat on Day1 and Day2. For each condition and each day, a cell’s spike raster (top) and its firing rate curve (bottom: mean rate versus position) during the first 4 laps of a trajectory are shown. Each tick is a spike. (C) Spatial information for all active cells under each condition (Trained-demo, Empty-track) on each day (Day1, Day2). Number on top of each bar: number of cells. There was a significant main effect between the conditions (F1,791 = 21, p=0, Two-way ANOVA), but not between days (F1,791 = 1.4, p=0.25). (D) Same as C, but for lap consistency. Although median values of lap consistent in Trained-demo appeared to be higher than those in Empty-track, there was no significant main effect between the conditions (F1,274 = 0.11, p=0.74, Two-way ANOVA) or between days (F1,274 = 1.8, p=0.17).