Arnold Brent L, Docherty Carrie L
Virginia Commonwealth University, Richmond, VA, USA.
J Athl Train. 2006 Jul-Sep;41(3):233-8.
Functional ankle instability has been attributed to proprioceptive loss. However, in previous studies of proprioception,authors have not investigated the ability to sense force at the ankle. Additionally, previous investigators have viewed functional ankle instability as either a present or absent condition,rather than a continuum.
To determine the relationship of ankle giving-way frequency and perceived ankle instability to ankle eversion force sense.
Cohort design.
Sports medicine research laboratory.
Twenty individuals (5 men,15 women) with a history of unilateral ankle instability.
INTERVENTION(S): We tested subjects with 2 loads: 10% and 30% of maximal voluntary isometric contraction.
MAIN OUTCOME MEASURE(S): We measured eversion force sense by calculating absolute, constant, and variable errors from a 3-trial force-matching procedure. Furthermore, subjects reported their frequency of giving way in units of times per day,week, or month, and these data were extrapolated to estimate annual giving-way frequency. Finally, subjects answers to 6 questions about ankle stability during typical daily or sports activities were summed to create a perceived ankle instability index.
Significant relationships were found for only the 10% maximal voluntary isometric contraction. For absolute error,a positive relationship existed between the number of self reported episodes of giving way and eversion force sense for both ipsilateral (r .58) and contralateral (r .49) testing of the injured ankle. Constant error was correlated with giving way(r = -.56) for ipsilateral testing of the injured ankle. The ankle instability index was also positively correlated with eversion force sense absolute error (r .51) for ipsilateral testing only.
Our results suggest that subjects with ankle instability had difficulty replicating eversion forces. Specifically,larger errors were related to both self-reported giving-way episodes and perceived ankle instability.
功能性踝关节不稳被认为与本体感觉丧失有关。然而，在以往关于本体感觉的研究中，作者并未研究踝关节感知力的能力。此外，以往的研究者将功能性踝关节不稳视为一种存在或不存在的状态，而非一个连续体。
确定踝关节松动频率和感知到的踝关节不稳与踝关节外翻力觉之间的关系。
队列研究设计。
运动医学研究实验室。
20名有单侧踝关节不稳病史的个体（5名男性，15名女性）。
我们用两种负荷对受试者进行测试：最大自主等长收缩的10%和30%。
我们通过一个3次试验的力匹配程序计算绝对误差、恒定误差和可变误差来测量外翻力觉。此外，受试者报告他们每天、每周或每月的松动次数，这些数据被外推以估计每年的松动频率。最后，将受试者对关于日常或体育活动中踝关节稳定性的6个问题的回答相加，得出一个感知到的踝关节不稳指数。
仅在最大自主等长收缩的10%时发现显著关系。对于绝对误差，在受伤踝关节的同侧（r = 0.58）和对侧（r = 0.49）测试中，自我报告的松动发作次数与外翻力觉之间存在正相关。对于受伤踝关节的同侧测试，恒定误差与松动相关（r = -0.56）。仅在同侧测试中，踝关节不稳指数也与外翻力觉绝对误差呈正相关（r = 0.51）。
我们的结果表明，踝关节不稳的受试者在复制外翻力方面存在困难。具体而言，更大的误差与自我报告的松动发作和感知到的踝关节不稳均有关。
