Effect of visual information on step-tracking movements in patients with intention tremor due to multiple sclerosis
Effect of visual information on step-tracking movements in patients with intention tremor due to multiple sclerosis
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DOI：
10.1191/1352458503ms949oa
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发表时间：
2003-01-01
期刊：
影响因子：
--
通讯作者：
Ketelaer, P
中科院分区：
文献类型：
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作者：
Feys, P;Helsen, WF;Ketelaer, P
研究了18例多发性硬化症(MS)意向性震颤患者和15例健康对照的视觉信息对步态跟踪运动的影响。参与者在五种视觉反馈条件下对固定目标进行了缓慢的手腕步进跟踪任务。结果表明，当目标和运动线索都有视觉显示时，意图震颤最明显。提取肢体运动的视觉信息比提取目标线索的视觉显示更能减少颤抖。当肢体运动的显示被遮挡时，患者和对照组的准确性都较低。然而，与健康对照组相比，患者更依赖肢体运动的视觉信息来进行准确的运动表现，当肢体运动的视觉显示在目标之间或附近被部分遮挡时，震颤减少而不会降低运动精度。
The effect of visual information on step-tracking movements was studied in 18 patients with intention tremor due to multiple sclerosis (MS) and 15 healthy controls. Participants performed a slow wrist step-tracking task with stationary targets under five visual feedback conditions. The display of the target and movement cues was selectively withdrawn to examine the effects of visual information on intention tremor and movement accuracy.Results showed that intention tremor was most pronounced when visual display of both target and movement cues was available. Withdrawing visual information of the limb movement reduced tremor more than withdrawing the visual display of the target cues. Both the patient and control group was less accurate when the display of limb movement was occluded. Patients, however, were more dependent on visual information of the limb movement for accurate motor performance than healthy controls.When the visual display of the limb movement was partially occluded between or near to the targets, tremor decreased without deterioration of movement accuracy.