Pain Research and Treatment / 2011 / Article / Fig 1

Review Article

Repeated Muscle Injury as a Presumptive Trigger for Chronic Masticatory Muscle Pain

Figure 1

Photomicrograph of the masseter muscle stained with H&E. (a) Naive masseter muscle. (b) Masseter muscle 12 days after eccentric muscle contraction. Arrows indicate regions of fibrosis. Scale bar = 100 μm.