Demura Shinichi, Kitabayashi Tamotsu, Kimura Akimitsu, Matsuzawa Jinzaburo
Faculty of Education, Kanazawa University, Japan.
J Physiol Anthropol Appl Human Sci. 2005 Sep;24(5):551-5. doi: 10.2114/jpa.24.551.
This study aimed to compare body sway characteristics of the healthy elderly and the disordered elderly. The subjects were 38 healthy elderly and 24 disordered elderly with disequilibrium. The latter consisted of two groups: 12 elderly with vestibular organ or central nervous systems disorder (central nervous disorders), and 12 elderly with disorder in other systems (other disorders). The measurement device can calculate the center of foot pressure (CFP) of vertical loads from the values of three vertical load sensors, which are located at the corners of an isosceles triangle on a level surface. The data sampling frequency was 20 Hz. Four body sway factors with high reliability (unit time sway, front-back sway, left-right sway, and high frequency band power) were used to evaluate body sway. As compared with healthy people, central nervous disorders had larger unit time sway, high frequency band power, and left-right sway factors. Other disorders were larger in unit time sway and high frequency band power factors. Central nervous disorders, as compared with other disorders, had larger unit time sway and left-right sway factors. Disorders produced large and fast sway, and central nervous disorders in particular showed a marked sway in the left-right direction. The existence of disease influenced body sway more than decline in various functions related to posture control with aging, because even with the same elderly, disorders showed a larger body sway.
本研究旨在比较健康老年人和患病老年人的身体摇摆特征。研究对象为38名健康老年人和24名患有平衡失调的患病老年人。后者分为两组：12名患有前庭器官或中枢神经系统疾病的老年人（中枢神经疾病组），以及12名患有其他系统疾病的老年人（其他疾病组）。测量装置可根据位于水平面上等腰三角形角上的三个垂直载荷传感器的值计算垂直载荷的足底压力中心（CFP）。数据采样频率为20Hz。采用四个可靠性较高的身体摇摆因素（单位时间摇摆、前后摇摆、左右摇摆和高频带功率）来评估身体摇摆。与健康人相比，中枢神经疾病组的单位时间摇摆、高频带功率和左右摇摆因素更大。其他疾病组的单位时间摇摆和高频带功率因素更大。与其他疾病组相比，中枢神经疾病组的单位时间摇摆和左右摇摆因素更大。疾病导致摇摆幅度大且速度快，尤其是中枢神经疾病组在左右方向表现出明显的摇摆。疾病的存在对身体摇摆的影响大于随着年龄增长与姿势控制相关的各种功能下降的影响，因为即使是相同年龄段的老年人，患病者的身体摇摆也更大。
