Fig. 6

c-Fos expression in the NTS and the area postrema (AP). a Example photomicrographs of brain sections containing c-Fos positive cells. b c-Fos expression in the area postrema in each experimental group (the control group, n = 5; l-histidine 0.75 g/kg group, n = 5; l-histidine 2.0 g/kg group, n = 6). c c-Fos expression in the NTS in each experimental group (the control group, n = 6; l-histidine 0.75 g/kg group, n = 5; l-histidine 2.0 g/kg group, n = 6). *p < 0.05 compared with the control group, ^† p < 0.05 compared with l-histidine 0.75 g/kg group (Tukey–Kramer’s test)