Figure 4

Cigarette smoke effect on locomotor activity. Letters above the bars indicate significant differences between the groups (a) difference in relation to the control group; (b) difference between the cigarette groups) analysed by one-way and two-way ANOVA, followed by Newman Keuls post hoc tests (p < 0.05). Data are expressed as the mean ± SEM (n = 8–12 in each group). CG: control group; RC: regular cigarette; TFC: tobacco-free cigarette.