Influence of an irregular surface and low light on the step variability of patients with peripheral neuropathy during level gait
Influence of an irregular surface and low light on the step variability of patients with peripheral neuropathy during level gait
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DOI：
10.1016/j.gaitpost.2004.06.006
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发表时间：
2005-08-01
期刊：
影响因子：
2.4
通讯作者：
Ashton-Miller, JA
中科院分区：
文献类型：
--
作者：
Thies, SB;Richardson, JK;Ashton-Miller, JA
周围神经病 (PN) 患者报告称，在弱光 (IL) 的不规则表面上行走比在规则照明 (FR) 的平坦表面上行走更加困难。我们测试了主要假设，即老年 PN 患者在 IL 条件下比在 FR 条件下表现出更大的步宽和步宽变异性。 42 名 PN 受试者（22 名男性，20 名女性：平均 +/- S.D.：64.7 +/- 9.8 岁）接受了病史、体格检查和电诊断测试。受试者被要求以舒适的速度行走 10 m，同时使用光电标记和脚踏开关以 100 Hz 的频率测量运动学和力数据。在 IL 和 FR 条件下进行了 10 项试验。使用 MATLAB (R) 算法计算步长、时间、长度和速度，并以标准差作为变异性的度量。结果表明，与 FR 相比，IL 条件下受试者表现出更大的步宽（197.1 +/- 40.8 mm 与 180.5 +/- 32.4 mm；P < 0.001）和步宽变异性（40.4 +/- 9.0 mm 与 34.5 +/- 8.4 mm；P < 0.001）、步数及其变异性（P < 0.001 和 P=分别为 0.003）和步长变异性（P < 0.001）。 IL 条件下平均步长和步态速度下降（两者 P < 0.001）。在 IL 条件下，步宽变异性和步时变异性分别与 PN 严重程度和跌倒史的临床测量相关性最佳。我们得出的结论是，IL 状况会导致 PN 患者步宽和其他步态参数的变异性增加。 (c) 2004 Elsevier B.V 保留所有权利。
Patients with peripheral neuropathy (PN) report greater difficulty walking on irregular surfaces with low light (IL) than on flat surfaces with regular lighting (FR). We tested the primary hypothesis that older PN patients would demonstrate greater step width and step width variability under IL conditions than under FR conditions. Forty-two subjects (22 male, 20 female: mean +/- S.D.: 64.7 +/- 9.8 years) with PN underwent history, physical examination, and electrodiagnostic testing. Subjects were asked to walk 10 m at a comfortable speed while kinematic and force data were measured at 100 Hz using optoelectronic markers and foot switches. Ten trials were conducted under both IL and FR conditions. Step width, time, length, and speed were calculated with a MATLAB (R) algorithm, with the standard deviation serving as the measure of variability. The results showed that under IL, as compared to FR, conditions subjects demonstrated greater step width (197.1 +/- 40.8 mm versus 180.5 +/- 32.4 mm; P < 0.001) and step width variability (40.4 +/- 9.0 mm versus 34.5 +/- 8.4 mm; P < 0.001), step time and its variability (P < 0.001 and P= 0.003, respectively), and step length variability (P < 0.001). Average step length and gait speed decreased underIL conditions (P < 0.001 for both). Step width variability and step time variability correlated best under IL conditions with a clinical measure of PN severity and fall history, respectively. We conclude that IL conditions cause PN patients to increase the variability of their step width and other gait parameters. (c) 2004 Elsevier B.V All rights reserved.