Figure 3, Comparisons of BOLD signals. (A) a, Comparisons of the mean BOLD signal change between the right and left S1/M1 during T_P, T_R, and T_L (a) as well as T_P+R+L (b) in all 15 subjects. (B) Comparisons of the mean BOLD signal change in the S1/M1 between the hemispheres contralateral and ipsilateral to the preferred chewing side during T_P+R+L in the five subjects with an evident left chewing-side preference. (C) Comparisons of the mean BOLD signal change in the S1/M1 between the hemispheres contralateral and ipsilateral to the preferred chewing side during T_P+R+L in the five subjects with an evident right chewing-side preference. (D) Comparisons of the mean BOLD signal change in the S1/M1 between the hemispheres contralateral and ipsilateral to the preferred chewing side during T_P+R+L in the subjects with an evident chewing-side preference. Solid bars indicate standard deviations. Abbreviations: CSP, chewing-side preference; right, right hemisphere; left, left hemisphere: contra, the hemisphere contralateral to the preferred chewing side; ipsi, the hemisphere ipsilateral to the preferred chewing side. *p < 0.05, ***p < 0.001.