Docherty Carrie L, Arnold Brent L
Department of Kinesiology, Smith Research Center, 2805 East Tenth Street, Bloomington, Indiana 47408, USA.
J Orthop Res. 2008 Nov;26(11):1489-93. doi: 10.1002/jor.20682.
The purpose of this study was to determine whether participants with functional ankle instability have deficits in force sense reproduction compared to uninjured participants. Twenty participants with no history of injury and 20 with functional ankle instability volunteered for this investigation. Participants in the instability group had a history of at least one ankle sprain and frequent episodes of giving way. Ankle force sense testing was performed at 10, 20, and 30% of eversion maximal voluntary isometric contraction. Ten trials were performed at each force. Absolute and variable errors were then calculated. We observed significant (p < 0.05) main effects for group for absolute and variable errors. Force sense absolute error was significantly greater in the functionally unstable ankles (3.7 +/- 2.2 N) compared to uninjured ankles (2.8 +/- 1.1 N). Variable error was also significantly greater in the functionally unstable ankles (3.2 +/- 1.8 N) than the uninjured ankles (2.4 +/- 0.8 N). Functional ankle instability is associated with deficits in an individual's ability to accurately reproduce a given force. This deficit may impair an individual's ability to set appropriate muscle force levels to provide stability to the joint.
本研究的目的是确定与未受伤的参与者相比，功能性踝关节不稳的参与者在力觉再现方面是否存在缺陷。20名无损伤史的参与者和20名功能性踝关节不稳的参与者自愿参与了本调查。不稳组的参与者有至少一次踝关节扭伤史且经常出现踝关节打软现象。在踝关节外翻最大自主等长收缩的10%、20%和30%时进行踝关节力觉测试。每个力水平进行10次测试。然后计算绝对误差和可变误差。我们观察到组间在绝对误差和可变误差方面存在显著的（p < 0.05）主效应。与未受伤的踝关节（2.8 +/- 1.1 N）相比，功能性不稳的踝关节的力觉绝对误差显著更大（3.7 +/- 2.2 N）。功能性不稳的踝关节的可变误差（3.2 +/- 1.8 N）也显著大于未受伤的踝关节（2.4 +/- 0.8 N）。功能性踝关节不稳与个体准确再现给定力的能力缺陷有关。这种缺陷可能会损害个体设定适当肌肉力量水平以维持关节稳定的能力。
