Aging and time to instability in posture
Aging and time to instability in posture
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DOI：
10.1093/gerona/53a.1.b71
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发表时间：
1998-01-01
影响因子：
5.1
通讯作者：
Newell, KM
中科院分区：
文献类型：
--
作者：
Slobounov, SM;Moss, SA;Newell, KM
两个实验的报告，成立了检查的空间-时间边界的姿势不稳定，在直立的立场作为一个功能的年龄（60-96岁）和姿势条件。受试者在不同的实验条件下（视力/无视力和手臂向上/向下）站在力平台上，以便确定年龄对姿势稳定性的关键动态特性的影响。结果表明，随着年龄的增长，压力中心的运动面积与稳定边界内的面积之比增加。此外，与姿势稳定性边界的虚拟接触时间随着年龄的增长而减少。总的来说，研究结果表明，随着年龄的增长，老年人的姿势稳定性的时空边界的边缘减少。这些减少的动态稳定性的边缘可能是一个因素，有助于逐步不稳定的姿势与老年人的老化。
Two experiments are reported that were set up to examine the spatial-temporal boundaries of postural instability in upright stance as a function of age (60-96 years) and postural conditions. Subjects stood on a force platform under different experimental conditions (vision/no vision and arms up/down) so that the effect of age on key dynamic properties of postural stability could be determined. The findings showed that the ratio of the area of the motion of the center of pressure to the area within the stability boundary increased with age. Also, the virtual time-to-contact with the postural stability boundary decreased with age. Collectively, the findings show that the margins to the spatial-temporal boundaries of postural stability decrease with advancing age in the elderly. These reduced margins of dynamic stability may be a factor contributing to the progressive instability of posture with aging in the elderly.