Figure 1From: The pendulum test as a tool to evaluate passive knee stiffness and viscosity of patients with rheumatoid arthritisLimb oscillation during pendulum test. Solid line represents the leg at starting position (extended leg) and at final position (flexed leg). The numbers indicate location of skin reference markers: 1, 2/3 thigh; 2, lateral femoral condyle; 3, head of fibula; 4, lateral malleolus.Back to article page