Lynch S A, Eklund U, Gottlieb D, Renstrom P A, Beynnon B
Department of Orthopaedics and Rehabilitation, McClure Musculoskeletal Research Center, University of Vermont, Burlington 05405-0084, USA.
Am J Sports Med. 1996 May-Jun;24(3):362-9. doi: 10.1177/036354659602400319.
Ten uninjured subjects (ages 18 to 30 years) had electromyographic testing of the peroneus longus, peroneus brevis, and tibialis anterior muscles in response to inversion moments at two speeds (50 and 200 deg/sec) and two joint angles (neutral and 20 degrees of plantar flexion) using a hydraulically controlled tilt platform. Subjects underwent 10 trials of each type of inversion moment on Day 1 testing, which included both legs. On Day 2, subjects again underwent 10 trials of each type of inversion moment, but only on one leg. Reliability was assessed by comparing left and right leg data within muscle groups for Day 1 testing. Repeatability was assessed by comparing Day 1 with Day 2 data. The latency measurements (the time between the beginning of the inversion moment and the onset of first motor response) for the peroneus brevis and tibialis anterior muscles were found to be reliable and repeatable with no significant differences between the same muscle groups. The peroneus longus muscle had a significant difference between legs but was found to be highly repeatable. Speed of inversion moment and plantar flexion angle both caused significant changes in latency response of the peroneus muscles, with increased speed producing a shorter latency response and increased angle causing a longer latency response. Our results indicate a loss of protective reflexes with increasing plantar flexion.
十名未受伤的受试者（年龄在18至30岁之间）使用液压控制倾斜平台，在两种速度（50和200度/秒）以及两个关节角度（中立位和20度跖屈）下，针对内翻力矩对腓骨长肌、腓骨短肌和胫骨前肌进行了肌电图测试。在第1天的测试中，受试者每条腿都进行了10次每种类型内翻力矩的试验。在第2天，受试者再次进行每种类型内翻力矩的10次试验，但仅针对一条腿。通过比较第1天测试中肌肉群内的左右腿数据来评估可靠性。通过比较第1天和第2天的数据来评估重复性。发现腓骨短肌和胫骨前肌的潜伏期测量值（内翻力矩开始到首次运动反应开始之间的时间）是可靠且可重复的，同一肌肉群之间无显著差异。腓骨长肌在两腿之间存在显著差异，但发现具有高度重复性。内翻力矩的速度和跖屈角度均导致腓骨肌潜伏期反应发生显著变化，速度增加会产生较短的潜伏期反应，而角度增加会导致较长的潜伏期反应。我们的结果表明，随着跖屈增加，保护性反射丧失。
