PDF(Pubmed)
Abstract：
Background: Patellofemoral osteoarthritis (PF OA) is exceptionally predominant and limiting. However, little is known about the risk factors that contribute to its onset and progression. Purpose: The aim of this study was to decide if women with PF OA descend stairs using different muscular activation strategies compared to similarly aged healthy controls. Methods: Thirty-one women with isolated PF OA and 11 similarly aged healthy women took part in this study. The activation onset and duration of PF OA in vastus medialis oblique (VMO), vastus lateralis (VL), gluteus medius (GM), transversus abdominis (TrA), and multifidus muscles were evaluated during the stair descent task using surface electromyography (EMG). Results: There was a non-significant difference between women with PF OA and healthy controls regarding all tested variables, except for the GM activation onset that was significantly delayed in women with PF OA, with the p-value of 0.011. Conclusion: The causes of PF OA differ and might not always be due to a lack of quadriceps strength or VMO activation deficiency, and prospective longitudinal studies are required to confirm this assumption.
摘要：
背景：髌股骨关节炎（PFOA）异常主要和限制性。然而,对导致其发病和进展的危险因素知之甚少。目的：这项研究的目的是确定与类似年龄的健康对照相比，患有PFOA的女性是否使用不同的肌肉激活策略下楼梯。方法：31例孤立性PFOA妇女和11例类似年龄的健康妇女参加了这项研究。股内侧斜肌（VMO）PFOA的激活开始和持续时间，股外侧肌（VL），臀中肌(GM)，腹横肌（TrA），在楼梯下降任务期间使用表面肌电图（EMG）评估多裂肌。结果：在所有测试变量方面，患有PFOA的女性和健康对照之间没有显着差异。除了在患有PFOA的女性中明显延迟的GM激活发作，p值为0.011。结论：PFOA的原因不同，可能并不总是由于股四头肌力量不足或VMO激活不足，和前瞻性纵向研究需要证实这一假设。
