Study on the Mechanism Underlying the Regulation of the NMDA Receptor Pathway in Spinal Dorsal Horns of Visceral Hypersensitivity Rats by Moxibustion

Figure 3

Pathology of colon tissues (HE stain 200). The observation of colon tissues under a light microscope showed that the overall structure of colon tissues of rats in the model group was clear. There were no abnormal pathological changes such as hyperplasia, erosions, or ulcers. There was no significant inflammatory cell infiltration and no obvious interstitial edema. The mucosal epithelium was complete, the glands in the lamina propria were arranged orderly, and the distribution of submucosa layer and muscular layer was regular.

(a) Normal group

(b) Model group

(c) Ro 25-6981 group

(d) Moxibustion group