Peterka R J, Black F O
Good Samaritan Hospital and Medical Center, R. S. Dow Neurological Sciences Institute, Portland, OR 97210.
J Vestib Res. 1990;1(1):87-96.
Postural responses to support surface displacements were measured in 214 normal human subjects ranging in age from 7 to 81 y. Motor tests measured leg muscle electromyographic (EMG) latencies, body sway, and the amplitude and timing of changes in center of pressure displacements in response to sudden forward and backward horizontal translations of the support surface upon which the subjects stood. There were small increases in both EMG latencies and the time to reach the peak amplitude of center of pressure responses with increasing age. The amplitude of center of pressure responses showed no change with age if the amplitude measures were normalized by a factor related to subject height. In general, postural responses to sudden translations showed minimal changes with age, and all age-related trends that were identified were small relative to the variability within the population.
对214名年龄在7至81岁之间的正常人类受试者测量了对支撑面位移的姿势反应。运动测试测量了腿部肌肉肌电图（EMG）潜伏期、身体摆动以及受试者站立的支撑面突然向前和向后水平平移时压力中心位移变化的幅度和时间。随着年龄的增长，EMG潜伏期和达到压力中心反应峰值幅度的时间均略有增加。如果通过与受试者身高相关的系数对幅度测量值进行归一化，压力中心反应的幅度则不会随年龄变化。总体而言，对突然平移的姿势反应随年龄变化极小，并且所确定的所有与年龄相关的趋势相对于人群内部的变异性都较小。
