Figure 2.

Mean (±SEM) changes in electrochemical currents and resulting changes in glucose concentration induced by different sensory stimuli in freely moving rats. Top graphs (A, C, E) show changes detected by glucose (red) and null (blue) sensors, and bottom graphs (B, D, F) show the resulting changes in glucose concentration calculated as a difference between active and null currents. Data for audio stimulus and novel object are shown with 2 s time resolution, and tail-touch shown with 4 s time resolution. In each case, two-way ANOVA revealed a significant current × time interaction (F_65,1690 = 1.95; F_90,2070 = 4.34 and F_180,2060 = 2.33; each p < 0.05) and the increases in glucose concentration were significant for each type of sensory stimuli (one-way ANOVA with repeated measures: sound, F_18,1680 = 2.41; novel object, F_18,1620 = 14.90; and tail-touch F_99,396 = 2.50; all p < 0.05). Partially these data were reported in ref (32).