Mechanism of quadriceps femoris muscle weakness in patients with anterior cruciate ligament reconstruction
Mechanism of quadriceps femoris muscle weakness in patients with anterior cruciate ligament reconstruction
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DOI：
10.1034/j.1600-0838.2002.01293.x
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发表时间：
2002-12-01
影响因子：
4.1
通讯作者：
Takeshita, D
中科院分区：
文献类型：
--
作者：
Konishi, Y;Fukubayashi, T;Takeshita, D
本研究旨在探讨前交叉韧带（ACL）重建术史不足6个月的患者股四头肌伽马环功能。为此，我们比较了10例ACL修复患者和12名正常健康受试者对振动刺激的反应，通过测量股四头肌的最大随意等长收缩（MVC）和积分肌电图（I-EMG）。通过测量膝关节伸展的MVC和股内侧肌、股外侧肌和股直肌的I-EMG，从每个受试者获得振动前数据。对髌下肌腱施加振动刺激，然后立即重复MVC和I-EMG记录。长时间振动导致对照组MVC和I-EMG均显著降低。相反，同样的刺激未能引起ACL修复组的变化。我们的研究结果表明，存在异常的伽马环功能的患者的股四头肌ACL修复，这可能会解释肌无力往往描述在这样的患者。
The purpose of this study was to investigate gamma loop function in the quadriceps femoris muscle in patients who with less than 6 month-history of anterior cruciate ligament (ACL) reconstruction. For this purpose, we compared the response to vibration stimulation in 10 patients with ACL repair and 12 normal healthy subjects, by measuring the maximal voluntary isometric contraction (MVC) and integrated electromyograms (I-EMG) of the quadiriceps, muscles. Pre-vibration data were obtained from each subject by measuring the MVC of the knee extension and the I-EMG from the vastus medialis, vastus lateralis, and rectus femoris muscles. Vibration stimulation was applied to the infrapatellar tendons, followed immediately by repeating the MVC and I-EMG recording. Prolonged vibration resulted in a significant decrease of both MVC and I-EMG in the control group. In contrast, the same stimulus failed to elicit changes in ACL-repair group. Our results suggest the presence of abnormal gamma loop function in the quadriceps femoris muscle of patients with ACL repair, which may explain the muscle weakness often described in such patients.