Hoffman M A, Koceja D M
Department of Kinesiology, Indiana University, Bloomington 47405, USA.
Arch Phys Med Rehabil. 1997 Mar;78(3):290-3. doi: 10.1016/s0003-9993(97)90036-8.
To investigate the reliability of a newly developed perturbation protocol for assessing dynamic balance.
Each subject was tested in two experimental balance conditions, static and dynamic. The dependent variables for the static condition were sway area (SA), sway path length (SPL), sagittal sway standard deviation (SSD), and lateral sway standard deviation (LaSD). During the dynamic condition trials a stimulus was delivered to the tibial nerves of both legs to perturb the subjects. The subjects were instructed to return to the pre-perturbation level of steadiness as soon as possible after the stimulation. The dependent variables for the dynamic condition were dynamic phase duration (DPD), sway path mean (SPM), linear sway standard deviation (LiSD), and sagittal sway standard deviation (SSD).
The motor control laboratory of a university department of kinesiology.
Ten subjects from a population-based sample of healthy adults.
An intraclass reliability estimate for all dependent measures in the static and dynamic conditions.
In the static condition, the variables SA, SPL, SSD, and LaSD had reliabilities of .94, .98, .86, and .92, respectively, and in the dynamic condition the reliability estimates for DPD. SPM, LiSD, and SSD were .90, .71, .80, and .92, respectively.
The results indicate the current technique provides a means of objectively measuring a subject's ability to regain static postural stability following electrically induced perturbation.
研究一种新开发的用于评估动态平衡的扰动方案的可靠性。
每位受试者在两种实验平衡条件下进行测试，即静态和动态。静态条件下的因变量为摆动面积（SA）、摆动路径长度（SPL）、矢状面摆动标准差（SSD）和侧面摆动标准差（LaSD）。在动态条件试验中，对双腿的胫神经施加刺激以扰动受试者。受试者被要求在刺激后尽快恢复到扰动前的稳定水平。动态条件下的因变量为动态阶段持续时间（DPD）、摆动路径平均值（SPM）、线性摆动标准差（LiSD）和矢状面摆动标准差（SSD）。
一所大学运动机能学系的运动控制实验室。
从基于人群的健康成年人样本中选取的10名受试者。
静态和动态条件下所有因变量测量的组内可靠性估计。
在静态条件下，变量SA、SPL、SSD和LaSD的可靠性分别为0.94、0.98、0.86和0.9（此处原文有误，应为0.92），在动态条件下，DPD、SPM、LiSD和SSD的可靠性估计分别为0.90、0.71、0.80和0.92。
结果表明，当前技术提供了一种客观测量受试者在电诱导扰动后恢复静态姿势稳定性能力的方法。
