Effects of increased inertial load in dynamic and randomized perturbed posturography.
Effects of increased inertial load in dynamic and randomized perturbed posturography.
复制标题
动态和随机扰动姿势描记术中惯性负载增加的影响。
DOI：
10.3109/00016489309135802
复制
发表时间：
1993
影响因子：
1.4
通讯作者：
L. Odkvist
中科院分区：
文献类型：
--
作者：
T. Ledin;L. Odkvist
肌肉无力出现在许多疾病中。本研究试图通过给受试者增加体重来模拟姿势控制肌肉的相对薄弱，并评估其对等速测试动态姿势图和随机扰动姿势图的影响。健康受试者10名，年龄15~39岁，平均26岁。体重53~82公斤。平衡测量是在躯干上部附加和不附加20%体重的情况下进行的，方法是在一件专门缝制的衬衫中放置几块铅金属。动态姿势描记(EquiTest)包括感觉组织测试，在该测试中，支撑面和视觉环境是稳定的或参照患者的摇摆，他或她的眼睛睁开或闭上。在动作协调部分，平台进行主动动作。在稳定的支撑面上的前后摇摆在视觉线索缺失或扭曲的情况下受到破坏，当视觉缺失时，可移动的支撑面上的矫正图案被改变。此外，在专门软件的驱动下，等速测试仪在45岁的S期间产生了随机的前后运动。除了稳定的条件外，还使用了小幅度和大幅度的扰动。受试者保持平衡的能力是通过在45岁的S期间的摆动速度和信心椭圆摆动面积来评估的。在负重过程中，无论有没有视力，稳定的支撑面上的摆动面积都较大。无论是小振幅还是大振幅，当视力丧失时，姿势摆动速度都较慢。
Muscular weakness is present in many diseases. The present study attempted to model a relative weakness of postural control muscles by loading the subjects with extra weight, and the effects on EquiTest dynamic posturography and randomized perturbed posturography were assessed. Ten healthy subjects aged 15-39 years (mean 26 years) were used. Their weights ranged 53-82 kg. Equilibrium was measured with and without an extra 20% of body weight attached to the upper part of the trunk by means of pieces of lead metal placed in a specially sewn shirt. Dynamic posturography (EquiTest) comprises a sensory organization test in which the support surface and visual surround are either stable or referenced to the patient's sway, his or her eyes open or closed. In a movement coordination part the platform makes active movements. Antero-posterior sway on a stable support surface with absent or distorted visual cues was marred, and the correction pattern was altered on a movable support surface when the vision was absent. Furthermore, the EquiTest apparatus was driven by special software to produce randomized antero-posterior movements during 45 s. In addition to stable conditions, small and large amplitude perturbations were used. The subject's ability to remain in equilibrium was estimated by the sway velocity and a confidence ellipse sway area during 45 s. During weightbearing, sway areas were larger on the stable support surface both with and without vision. Postural sway velocity was lower when vision was absent both using small and large amplitudes.(ABSTRACT TRUNCATED AT 250 WORDS)