Small C, Waters J T, Voight M
North Ridge Medical Center, Ft. Lauderdale, FL 33334.
J Orthop Sports Phys Ther. 1994 Jun;19(6):335-40. doi: 10.2519/jospt.1994.19.6.335.
Methods for quantifying deficits in proprioceptive feedback need to be examined. The purpose of this study was to compare two protocols measuring hamstring reaction time. Forty subjects, 13 males and 27 females, between 21 and 31 years of age (means = 24.3, SD = 2.04) were tested bilaterally on the Kin-Com isokinetic dynamometer with simultaneous use of the KC-EMG electromyograph. Subjects were instructed to maximally contract their hamstring musculature in response to a sudden lever arm movement. The peak torque time (PTT) protocol quantified the time lapse between initial lever arm movement and the generation of maximum torque. The electromyograph time (EMGT) protocol measured the time lapse between initial lever arm movement and initial myoelectrical activity of the hamstring musculature. Both PTT and EMGT were found to be reliable (Cronbach alpha 0.823-0.896), with no significant difference (p < .05) between dominant and nondominant limbs. These results indicate that PTT and EMGT are effective for quantifying hamstring reaction time and that the uninvolved lower extremity may be used as a control.
需要研究量化本体感觉反馈缺陷的方法。本研究的目的是比较两种测量腘绳肌反应时间的方案。对40名年龄在21至31岁之间（平均年龄=24.3，标准差=2.04）的受试者进行了双侧测试，其中男性13名，女性27名，测试使用Kin-Com等速测力计，并同时使用KC-肌电图仪。受试者被要求在杠杆臂突然移动时最大程度地收缩其腘绳肌。峰值扭矩时间（PTT）方案量化了从杠杆臂初始移动到产生最大扭矩之间的时间间隔。肌电图时间（EMGT）方案测量了从杠杆臂初始移动到腘绳肌初始肌电活动之间的时间间隔。发现PTT和EMGT都是可靠的（克朗巴哈系数0.823 - 0.896），优势侧和非优势侧肢体之间无显著差异（p <.05）。这些结果表明，PTT和EMGT对于量化腘绳肌反应时间是有效的，并且未受累的下肢可以用作对照。
