Rodríguez-Fernández Ángel L, Rebollo-Roldán Jesús, Jiménez-Rejano José J, Güeita-Rodríguez Javier
Department of Nursing and Physical Therapy, CEU-San Pablo University, Carretera Boadilla del Monte, Km 5,300, Urbanización Montepríncipe, 28668, Boadilla del Monte, Madrid, Spain(∗).
Department of Physical Therapy, University of Sevilla, Sevilla, Spain(†).
PM R. 2016 Jun;8(6):536-44. doi: 10.1016/j.pmrj.2015.09.009. Epub 2015 Sep 25.
Some motor impairments, such as decreased reaction of peroneal muscles, altered kinematics, or poor postural control, have been described in people with functional ankle instability. Evidence shows a possible relationship between fibular nerve impairments and functional ankle instability.
To investigate the electrophysiologic excitability of the common fibular nerve, as measured by strength-duration curves, in subjects with functional ankle instability compared with a control group without ankle impairment.
A cross-sectional study.
University Research laboratory.
Fifty subjects with functional ankle instability (35 men, 15 women; ages 24.36 ± 5.01 years) and 63 uninjured control patients (44 men, 19 women; ages 22.67 ± 4.85 years) were recruited by convenience sampling.
Not applicable.
Strength-duration curves of the common fibular nerve were made in all participants. Rheobase, chronaxie, Bawen index, accommodation index, galvano-tetanic threshold, and intensity thresholds for different pulse durations were obtained and compared between the 2 groups.
Subjects with functional ankle instability show increased values of chronaxie (0.58 ± 0.24 ms versus 0.47 ± 0.16 ms; P = .004), Bawen index (1.53 ± 0.24 versus 1.39 ± 0.21; P = .002), and intensity thresholds for pulse durations ≤2 ms both for rectangular and triangular pulse wave forms. The accommodation index was smaller in subjects with functional ankle instability than controls (3.7 ± 0.72 versus 4.05 ± 0.98; P = .036). The remaining parameters did not show significant differences between groups.
These findings suggest that subjects with functional ankle instability show a decreased excitability in their common fibular nerve when compared with subjects without ankle injuries.
在功能性踝关节不稳患者中，已发现一些运动功能障碍，如腓骨肌反应降低、运动学改变或姿势控制不佳。有证据表明腓总神经损伤与功能性踝关节不稳之间可能存在关联。
通过强度-时间曲线测量，研究功能性踝关节不稳受试者与无踝关节损伤的对照组相比，腓总神经的电生理兴奋性。
横断面研究。
大学研究实验室。
通过便利抽样招募了50名功能性踝关节不稳受试者（35名男性，15名女性；年龄24.36±5.01岁）和63名未受伤的对照患者（44名男性，19名女性；年龄22.67±4.85岁）。
不适用。
对所有参与者绘制腓总神经的强度-时间曲线。获取两组的基强度、时值、巴温指数、适应指数、电刺激阈和不同脉冲持续时间的强度阈值并进行比较。
功能性踝关节不稳受试者的时值（0.58±0.24毫秒对0.47±0.16毫秒；P = 0.004）、巴温指数（1.53±0.24对1.39±0.21；P = 0.002）以及矩形和三角形脉冲波形下脉冲持续时间≤2毫秒时的强度阈值均升高。功能性踝关节不稳受试者的适应指数低于对照组（3.7±0.72对4.05±0.98；P = 0.036）。其余参数在两组之间未显示出显著差异。
这些发现表明，与无踝关节损伤的受试者相比，功能性踝关节不稳受试者的腓总神经兴奋性降低。
