Figure 1From: TRPV1 channel-mediated bilateral allodynia induced by unilateral masseter muscle inflammation in ratsMorphological indications of inflammation occurred in the masseter muscle following injection of CFA. (A) Haematoxylin and eosin staining 4 days following injection of CFA in masseter muscle; note the extensive infiltration of inflammatory cells (indicated in arrows) and vacuoles (indicated in asterisks). (B) Masseter muscle contralateral to CFA injected side. (C) Masseter muscle 4 days after injection of saline, and no signs of inflammation were observed in saline injected and contralateral masseter muscle. The scale bar represents 20 μm.Back to article page