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Association of Sensorimotor Function with Knee Joint Kinematics During Locomotion in Knee Osteoarthritis

Bennell KL, Hinman RS, Metcalf BR: Association of sensorimotor function with knee joint kinematics during locomotion in knee osteoarthritis. Am J Phys Med Rehabil 2004;83:455–463. Objective:To evaluate the relationship between quadriceps sensorimotor function (knee joint-position sense, quadriceps strength, and quadriceps onset of activity) and knee joint kinematics (knee flexion at initial contact and loading) during level walking and stair descent in a large cohort of 220 people with knee osteoarthritis. Design:Cross-sectional correlational study. Results:Joint-position sense correlated with knee flexion at initial contact during both tasks (r = −0.20 and −0.14, P <0.05). Strength correlated with peak loading response knee flexion during both tasks (r = 0.17 and 0.20, P < 0.05). Quadriceps onset correlated with knee flexion at initial contact during stair descent (r = 0.14, P < 0.05). Furthermore, differences in kinematic variables were observed when participants were divided into those with best and worst sensorimotor function. Conclusion:Impaired sensorimotor function as measured in this study is not strongly associated with altered knee joint kinematics observed in knee osteoarthritis patients during locomotion.