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Pennation angle and fascicle length of TA ((a)–(d)) and MG ((e)–(h)) in the affected side, the unaffected side of the subjects after stroke, and the right side of healthy subjects as a function of ankle joint angle at the rest condition and MVC. The error bar represents 1 standard deviation (SD). *Any significant difference between the affected group and the unaffected group (t test, P < 0.05).
