Figure 3: Differences in behavioral responses and central dopaminergic activities between one exposure (n = 9 for each group) and two exposures (n = 6 for each group) to the open field test in male Formosan wood mice and C57BL/6 mice. Distance travelled in (a) total, (b) the central area and (c) the peripheral area in male C57BL/6 and Formosan wood mice after one and two exposures to the open field test. DOPAC/DA ratios in the (d) NA, (e) ST, and (f) MPFC in male C57BL/6 and Formosan wood mice after one and two exposures to the open field test. The vertical line above each bar represents the SEM (n = 9 and 6 for each group). **P < 0.01 and ***P < 0.001, compared with the one exposure to the open field. DOPAC/DA: 3,4-Dihydroxyphenylacetic acid/Dopamine, MPFC: Medial prefrontal cortex, NA: Nucleus accumbens, ST: Striatum, SEM: Standard error of the mean.