Neural mechanism of gastric motility regulation by electroacupuncture at RN12 and BL21: A paraventricular hypothalamic nucleus-dorsal vagal complex-vagus nerve-gastric channel pathway

Figure 3 c-fos expression in the paraventricular hypothalamic nucleus. A: Photomicrographs of the hypothalamus sections showing Fos immunoreactivity in the paraventricular hypothalamic nucleus (PVN). Lane a: Model group; Lane b: Non-acupoint group; Lane c: BL21 group; Lane d: RN12 group; Lane e: RN12 + BL21 group. The anatomic locations of the photomicrographs are indicated at the top, adapted from the atlas of Paxinos and Watson. Fos-positive neurons are presented as dark brown staining in the cell nuclei; B: Integral optical density (IOD) of Fos-positive neurons in the PVN (^bP < 0.01 vs the MOD group; ^dP < 0.01 vs the RN12 + BL21 group). 3 V: Third ventricle.