Comparative analysis of diadochokinetic movements
Comparative analysis of diadochokinetic movements
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DOI：
10.1016/s1050-6411(98)00050-9
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发表时间：
1999-08-01
影响因子：
2.5
通讯作者：
Mai, N
中科院分区：
文献类型：
--
作者：
Hermsdörfer, J;Marquardt, C;Mai, N
运动障碍检查是神经学检查的一个固有部分。已经提出了各种量化方法来增加这种检查的客观性、敏感性和可靠性。然而，所使用的方法和所进行的分析在不同的任务之间有很大的不同。我们使用三维超声记录设备连续记录三次双动运动中的关节角度，避免了运动的任何外部约束。对63例健康对照者的前臂交替旋前、旋后、全手轻叩和单独用食指轻叩进行了分析。捕捉性别、性别和手活动影响的最敏感指标是频率。在所有任务中，右手都比左手快，敲击动作随年龄的增长而下降，男性受试者在前臂伸肌运动中比女性受试者快。其他表征运动速度的测量方法，如最大角速度和加速度，在检测相同的统计效应时没有产生可比的灵敏度。然而，在前臂横突运动测试中，角速度获得了最高的重测信度，而在敲击任务中，频率得到了再现。表征角速度剖面对称性和个体内部可变性的附加措施被证明在很大程度上与运动速度无关。神经系统患者的例子表明，这些数据定义了一个有价值的标准，可以精确地评估病理表现。此外，不同的测量方法捕获了运动表现的可分离方面，这可能进一步有助于表征缺陷和调整治疗。1999爱思唯尔科学有限公司版权所有。
Tests of diadochokinesia are an inherent part of a neurological examination. Various quantifying methods have been proposed to increase the objectivity, sensitivity, and reliability of such examinations. The methods used and analyses performed, however, differ substantially between tasks. We used a three-dimensional, ultrasound-based recording device to continuously record joint angles during three diadochokinetic movements, avoiding any external constraints of the movements. Alternate pronation and supination of the forearm, tapping with the whole hand and with the index finger in isolation were analyzed in a sample of 63 healthy control subjects. The most sensitive measure for capturing effects of gender, sex, and active hand was frequency. The right hand was faster than the left in all tasks, tapping performance declined with increasing age, and male subjects were faster than females in forearm diadochokinesia. Other measures that characterize speed of movement such as maximum angular velocities and accelerations did not yield comparable sensitivity in detecting the same statistical effects. However, angular velocity achieved the highest test-retest reliability for forearm diadochokinesia, while frequency was reproduced in the tapping tasks. Additional measures characterizing symmetry of the angular velocity profiles and intraindividual variability were shown to be largely independent of movement speed. Examples in neurological patients showed that the data define a valuable standard against which pathological performance can be precisely evaluated. In addition, the different measures captured dissociable aspects of motor performance that may further help to characterize the deficit and adjust therapy. (C) 1999 Elsevier Science Ltd. All rights reserved.