中文摘要：

为有效检测和评估老年人及残疾人的平衡功能障碍，提出一种平衡功能检测与评估方法。首先选取睁眼及闭眼模式下的重心轨迹长度、单位面积轨迹长度、峭度、左右重心分布比及前后重心分布比共10个指标来定量检测平衡功能，然后运用主成分分析法对所选评价指标进行融合，最后根据主成分因子的方差贡献率确定主成分因子的权值，进而得出综合评价值，以此帮助受试者完成平衡功能评估。采用自行研制的平衡功能检测与评估系统，在2周内对30例平衡功能障碍患者（病例组）和30例性别、年龄、身高及体重与病例组相匹配的健康人（对照组）进行2次平衡功能检测与评估，对照组综合评价值的统计值为4．067±0．540（n=30，mean±SD），病例组综合评价值的统计值为2．054±0．685，两组相比具有统计学显著差异。实验表明，该平衡功能检测与评估方法合理，具有应用价值。

英文摘要：

In this paper, a new method is proposed aiming to effectively detect and assess the balance dysfunction of elderly and hemiplegic patients. First, five indicators were selected under conditions of eye open or eye closed for quantitative detection of the balance function, including track length of center of gravity, track length per unit area, kurtosis, distribution ratio of center of gravity between left and right, distribution ratio of center of gravity between front and rear. Then the indicators were fused together using principal component analysis （PCA）. Next, weights of principal component factors were determined by their variance contribution rate. Finally, the balance function assessment of subjects was completed by computing a comprehensive evaluation based on PCA. Thirty subjects with balance dysfunction （case group ） and thirty sex-, age-, height- and weight-matched healthy subjects （control group） were recruited in the experiment. Their balance function were detected and assessed twice within two weeks using an independently research system. The statistical value of comprehensive evaluation index is 4. 067 ± 0. 540 （ n = 30, mean ± SD） in the control group, while it is 2. 054 ± 0. 685 （ n = 30, mean ±SD） in the case group. Results show that the method for balance function detection and assessment is reasonable and practical.