Coordination of Vastus Medialis, Rectus Femoris and Vastus Lateralis in Patients with Knee Osteoarthritis
- VernacularTitle:膝骨关节炎患者股内侧肌、股直肌和股外侧肌间的协调性
- Author:
Dongliang SHI
;
Ninghua WANG
;
Bin XIE
- Publication Type:Journal Article
- Keywords:
knee osteoarthritis, quadriceps femoris, surface electromyogram, muscle strength
- From:
Chinese Journal of Rehabilitation Theory and Practice
2010;16(5):473-477
- CountryChina
- Language:Chinese
-
Abstract:
ObjectiveTo compare the coordination characteristic of the vastus medialis (VM), rectus femoris (RF) and vastus lateralis (VL) between patients with knee osteoarthritis and healthy subjects. Methods34 patients with knee osteoarthritis and 34 controls with normal knee were tested in isometric knee extension at knee joint angles of 10°, 60°, 100° flexion and isokinetic knee extension at velocities of 60°/s and 180°/s. Surface electromyogram (EMG) was recorded in the VM, RF and VL. The activation sequence of muscles and VM/VL EMG ratio were analyzed. ResultsThe VM started significantly later than the VL in isokinetic contraction at 180°/s in patients compared with the controls (P<0.05), and the VM/VL EMG ratio decreased in isometric contraction with knee extension at 10° (P<0.05). ConclusionThe coordination of the vastus medialis, rectus femoris and vastus lateralis decreases in the knee osteoarthritis patients.
