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首页> 外文期刊>Journal of athletic training >Chronic Ankle Instability and Corticomotor Excitability of the Fibularis Longus Muscle
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Chronic Ankle Instability and Corticomotor Excitability of the Fibularis Longus Muscle

机译：腓骨长肌的慢性踝关节不稳定性和皮质运动兴奋性

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Context: Neuromuscular deficits are common in people with chronic ankle instability (CAI). Corticomotor pathways are very influential in the production of voluntary muscle function, yet these pathways have not been evaluated in people with CAI. Objective: To determine if corticomotor excitability of the fibularis longus (FL) differs between individuals with unilateral CAI and matched control participants without CAI. Design: Case-control study. Setting: Laboratory. Patients or Other Participants: Ten people with CAI (4 men, 6 women; age = 21.2 ± 1.23 years, height = 175.13 ± 9.7 cm, mass = 77.1 ± 13.58 kg) and 10 people without CAI (4 men, 6 women; age = 21.2 ± 2.3 years; height = 172.34 ± 8.86 cm, mass = 73.4 ± 7.15 kg) volunteered for this study. Main Outcome Measure(s): Transcranial magnetic stimulation was performed over the motor cortex on neurons corresponding with the FL. All testing was performed with the participant in a seated position with a slightly flexed knee joint and the ankle secured in 10° of plantar flexion. The resting motor threshold (RMT), which was expressed as a percentage of 2 T, was considered the lowest amount of magnetic energy that would induce an FL motor evoked potential equal to or greater than 20 μV, as measured with surface electromyography, on 7 consecutive stimuli. In addition, the Functional Ankle Disability Index (FADI) and FADI Sport were used to assess self-reported function. Results: Higher RMTs were found in the injured and uninjured FL of the CAI group (60.8% ± 8.4% and 59.1% ± 8.99%, respectively) than the healthy group (52.8% ± 8.56% and 52% ± 7.0%, respectively; F1,18 = 4.92, P = .04). No leg × group interactions (F1,18 = 0.1, P = .76) or between-legs differences (F1,18 = 0.74, P = .40) were found. A moderate negative correlation was found between RMT and FADI (r = ?0.4, P = .04) and FADI Sport (r = ?0.44, P = .03), suggesting that higher RMT is related to lower self-reported function. Conclusions: Higher bilateral RMTs may indicate deficits in FL corticomotor excitability in people with CAI. In addition, a moderate correlation between RMT and FADI suggests that cortical excitability deficits may be influential in altering function.
机译：背景：神经肌肉缺陷在慢性踝关节不稳（CAI）患者中很常见。皮质运动通路在自愿性肌肉功能的产生中非常有影响力，但是尚未在CAI患者中评估这些通路。目的：确定单侧CAI的个体和相匹配的无CAI的对照参与者之间腓骨长肌（FL）的皮质激素运动兴奋性是否存在差异。设计：病例对照研究。地点：实验室。患者或其他参与者：十名患有CAI的患者（4名男性，6名女性;年龄= 21.2±1.23岁，身高= 175.13±9.7厘米，体重= 77.1±13.58 kg）和10名无CAI的患者（4名男性，6名女性;年龄） = 21.2±2.3岁;身高= 172.34±8.86厘米，体重= 73.4±7.15公斤）。主要观察指标：在运动皮层上对与FL相对应的神经元进行经颅磁刺激。所有测试均在参与者处于坐姿的情况下进行，膝关节略微弯曲，脚踝固定在足底屈曲10°处。静息运动阈值（RMT）以2 T的百分比表示，被认为是最低磁能，该磁能在表面肌电图上在7岁时诱发等于或大于20μV的FL电动机诱发电位。连续的刺激。此外，功能性踝残障指数（FADI）和FADI Sport用于评估自我报告的功能。结果：CAI组受伤和未受伤的FL中的RMT较高（分别为60.8 ％±8.4 ％和59.1 ％±8.99 ％），高于健康组（52.8 ％±8.56 ％和52 ）。分别为％±7.0 ％; F1,18 = 4.92，P = .04）。没有发现腿部与组之间的相互作用（F1,18 = 0.1，P = .76）或腿间差异（F1,18 = 0.74，P = .40）。在RMT和FADI之间（r =？0.4，P = .04）和FADI Sport（r =？0.44，P = .03）之间发现了中等程度的负相关，表明较高的RMT与较低的自我报告功能有关。结论：较高的双边RMT可能表明CAI患者FL皮质运动兴奋性不足。此外，RMT和FADI之间的适度相关性表明皮质兴奋性缺陷可能对功能改变有影响。

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