Yoshida Takaki, Suzuki Toshiaki
Clinical Physical Therapy Laboratory, Kansai University of Health Sciences: 2-11-1 Wakaba, Kumatori, Sennan, Osaka 590-0482, Japan.
Faculty of Health Sciences, Kansai University of Health Sciences, Japan.
J Phys Ther Sci. 2020 Jan;32(1):33-37. doi: 10.1589/jpts.32.33. Epub 2020 Jan 22.
[Purpose] This study aimed to examine the relationship between chronic ankle sprain instability and ultrasonography of the peroneus muscles during a single-leg standing task. [Participants and Methods] We examined nine college-aged students with a history of lateral ankle joint sprain with chronic ankle sprain instability scores less than 24. Participants underwent ultrasonographic measurement of the pennation angle and muscle thickness of the peroneal and gastrocnemius muscle groups of both legs. In addition, participants were evaluated for fluctuation by the root mean square calculated from accelerations in the anteroposterior, lateral-horizontal, and vertical directions during the single-leg standing position by affixing the accelerometer to their waist. Measurement results were compared between sprain and non-sprain sides. [Results] Ultrasonography revealed a significant reduction in the feathered pennation angle of the long peroneal muscle on the side of the sprain, but no other significant differences. Also, significant extension was observed on the side of the sprain in the anteroposterior and vertical directions during single-leg standing; however, no significant differences were found in the lateral-horizontal direction. [Conclusion] Participants with chronic ankle sprain instability exhibited greater fluctuation in the anteroposterior and vertical directions. Such fluctuations are believed to be compensatory in nature because the feathered horn of the long peroneal muscle is decreased, and pronation of the forefoot is difficult during one-leg standing.
[目的] 本研究旨在探讨慢性踝关节扭伤不稳与单腿站立任务期间腓骨肌超声检查结果之间的关系。[参与者与方法] 我们对9名有踝关节外侧扭伤史、慢性踝关节扭伤不稳评分低于24分的大学生进行了检查。参与者接受了双腿腓骨肌和腓肠肌群羽状角及肌肉厚度的超声测量。此外，通过将加速度计固定在参与者腰部，测量其单腿站立位时前后、横向水平和垂直方向加速度计算所得的均方根来评估其波动情况。比较扭伤侧与未扭伤侧的测量结果。[结果] 超声检查显示，扭伤侧腓骨长肌的羽状角显著减小，但无其他显著差异。此外，单腿站立时，扭伤侧在前后和垂直方向上有明显的伸展；然而，在横向水平方向上未发现显著差异。[结论] 慢性踝关节扭伤不稳的参与者在前后和垂直方向上表现出更大的波动。这种波动被认为具有代偿性质，因为腓骨长肌的羽状角减小，且单腿站立时前足内旋困难。
