Firoozbakhsh K K, Kunkel C F, Scremin A M, Moneim M S
Department of Orthopedics and Rehabilitation, School of Medicine, University of New Mexico, Albuquerque 87131-3581.
Am J Phys Med Rehabil. 1993 Dec;72(6):379-85.
This study was conducted to determine the feasibility of quantifying spasticity by measuring the resistance to passive movement using an isokinetic dynamometer. A quantifiable method was developed by determining the summation of the four consecutive resisting torque amplitudes during flexion and extension of the knee at specified speeds and range of motion. A more rigorous assessment was made by finding the slope of the linear regression curve of torque-velocity data. Although the values of maximum torque were higher in the spastic group than in the normal group, the difference was statistically significant only when the sum of the torque amplitudes was considered (P < 0.0028). Values of the maximum torque as well as the sum of the torque amplitudes increased in a linear fashion (r > 0.75) with increasing velocity. The slopes of the torque-velocity curves were greater in spastic subjects than in normal subjects. The sensitivity to the rate of stretch was statistically greater (P < 0.0004) for the spastic group than normals only when the sum of torque amplitudes was considered. The corresponding data obtained during the flexion and extension of the knee were not statistically different (P > 0.05). Serial summation of torque amplitudes and measurement of slope in the torque-velocity curve are sensitive and repeatable methodologies for the measurement of spasticity assessment.
本研究旨在通过使用等速测力计测量被动运动阻力来确定量化痉挛的可行性。通过确定在特定速度和运动范围内膝关节屈伸过程中四个连续抵抗扭矩幅度的总和，开发了一种可量化的方法。通过求扭矩-速度数据的线性回归曲线的斜率进行了更严格的评估。虽然痉挛组的最大扭矩值高于正常组，但仅在考虑扭矩幅度总和时差异才有统计学意义（P < 0.0028）。最大扭矩值以及扭矩幅度总和随速度增加呈线性增加（r > 0.75）。痉挛受试者的扭矩-速度曲线斜率大于正常受试者。仅在考虑扭矩幅度总和时，痉挛组对拉伸速率的敏感性在统计学上高于正常组（P < 0.0004）。在膝关节屈伸过程中获得的相应数据无统计学差异（P > 0.05）。扭矩幅度的系列总和以及扭矩-速度曲线斜率的测量是用于痉挛评估测量的敏感且可重复的方法。
