Beuter A, Milton J G, Labrie C, Glass L, Gauthier S
Départment de Kinanthropologie, Université du Québec à Montreal.
Exp Neurol. 1990 Nov;110(2):228-35. doi: 10.1016/0014-4886(90)90034-p.
The dependence of movement on visual information was compared for healthy individuals and Stage II-III patients with Parkinson's disease (PD). A time delay (0-1400 ms) was introduced into a visually guided motor tracking task which required the subject to maintain constant index finger position relative to a stationary baseline on an oscilloscope. For healthy individuals, delayed visual feedback induced complex oscillations in finger displacement. Similar results were obtained for four of eight patients with PD. However, oscillations were not induced in four of eight patients with PD because of reduced gain and/or a higher tremor amplitude at zero delay which obscured the tracking error. These results suggest that some patients with PD are able to utilize visual information for controlling tracking in this motor task in the same manner as healthy individuals.
对健康个体和帕金森病（PD）II - III期患者运动对视觉信息的依赖性进行了比较。在一项视觉引导的运动跟踪任务中引入了一个时间延迟（0 - 1400毫秒），该任务要求受试者相对于示波器上的固定基线保持食指位置恒定。对于健康个体，延迟的视觉反馈会在手指位移中引发复杂的振荡。八名PD患者中有四名获得了类似的结果。然而，八名PD患者中有四名未引发振荡，原因是在零延迟时增益降低和/或震颤幅度较高，这掩盖了跟踪误差。这些结果表明，一些PD患者能够像健康个体一样利用视觉信息来控制这项运动任务中的跟踪。
