Quadriceps femoris muscle weakness and activation failure in patients with symptomatic knee osteoarthritis
Quadriceps femoris muscle weakness and activation failure in patients with symptomatic knee osteoarthritis
复制标题
DOI：
10.1016/s0736-0266(03)00154-2
复制
发表时间：
2004-01-01
影响因子：
2.8
通讯作者：
Snyder-Mackler, L
中科院分区：
文献类型：
--
作者：
Lewek, MD;Rudolph, KS;Snyder-Mackler, L
目的：股四头肌无力在膝关节骨关节炎（OA）患者中很常见，并被归因于自主活动的失败。方法上的差异可能导致了之前关于骨关节炎患者自主激活广泛失败的报告。本研究的目的是确定股四头肌无力和激活失败的程度在中年患者有症状的内侧膝关节骨关节炎使用最大自愿等长收缩（MVIC）和突发叠加technique.Methods：测量股四头肌MVIC和自愿激活的程度在12例膝关节OA和12个年龄相仿的未受伤的受试者。自愿激活进行测试，通过叠加一列电刺激上的最大努力意志收缩的股四头肌muscles.Results：组的受试者与膝关节OA有显着减少股四头肌力量相对于体重指数（BMI）比对照组（p = 0.010）。没有观察到自愿激活的差异（p = 0.233），但是，50%的OA组，只有25%的对照组未能完全激活股四头肌。讨论：股四头肌无力的发现与过去的文献是一致的。提供足够的指导、反馈和多次尝试以最大限度地收缩肌肉，可能会产生比以前报告的更大的意志激活（因此激活失败更少）。这一发现对膝关节骨关节炎患者股四头肌的康复具有重要意义。(C)2003骨科研究学会。由爱思唯尔有限公司出版。保留所有权利。
Purpose: Quadriceps weakness is common in patients with knee osteoarthritis (OA), and has been attributed to failure of voluntary activation. Methodological differences may have contributed to previous reports of extensive failure of voluntary activation in patients with osteoarthritis. The purpose of this study was to determine the extent of quadriceps muscle weakness and activation failure in middle aged patients with symptomatic medial knee osteoarthritis using maximum voluntary isometric contractions (MVIC) and a burst superimposition technique.Methods: Measurements of quadriceps MVIC and extent of voluntary activation were made in 12 subjects with knee OA and 12 similarly aged uninjured subjects. Voluntary activation was tested by superimposing a train of electrical stimulation on a maximal effort volitional contraction of the quadriceps muscle.Results: The group of subjects with knee OA had significantly less quadriceps strength relative to body mass index (BMI) than the group of control subjects (p = 0.010). No difference in voluntary activation was observed (p = 0.233), however, 50% of the OA group, and only 25% of the control group failed to fully activate the quadriceps.Discussion: The finding of quadriceps weakness is consistent with past literature. Providing adequate instruction, feedback, and several attempts to maximally contract the muscle likely yielded greater volitional activation (thus less activation failure) than had been reported previously. This finding has implications for the rehabilitation of weakened quadriceps in patients with knee osteoarthritis. (C) 2003 Orthopaedic Research Society. Published by Elsevier Ltd. All rights reserved.