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. 2021 Dec 16;12:794062. doi: 10.3389/fphys.2021.794062

Figure 2.

Figure 2

The main symptoms of patients with KOA. The main symptoms of patients with KOA include pain, stiffness, muscle weakness, and reduced joint mobility. Pain is always associated with inflammatory stimulation, and never conduction. Joint fibrosis and joint adhesion are related to stiffness. Muscle dysfunction can cause muscle weakness. Joint space narrowing is related to reduced joint mobility.