Influence of gaze distance and downward gazing on postural sway in hemiplegic stroke patients
Influence of gaze distance and downward gazing on postural sway in hemiplegic stroke patients
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DOI：
10.1007/s00221-013-3762-3
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发表时间：
2014-02-01
影响因子：
2
通讯作者：
Domen, Kazuhisa
中科院分区：
文献类型：
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作者：
Aoki, Osamu;Otani, Yoshitaka;Domen, Kazuhisa
注视距离和头部屈曲抑制健康受试者的姿势摇摆。然而，这些因素对中风患者的影响尚未完全阐明。在这项研究中，我们的目的是评估凝视距离和向下凝视对中风患者姿势摇摆的影响。我们检查了15名中风患者和14名老年对照。在以下5种情况下测量受试者的姿势摇摆：眼睛向前固定在位于前方600 cm的标记上（600 cm条件）;眼睛向前固定在前方150 cm处的标记上（150 cm条件）;眼睛向下固定（向下的状态）;受试者面向正前方，但眼睛闭着（向前闭合状态）;以及受试者面朝下但眼睛闭合（向下闭合状态）。确定前后（A-P RMS）和内外（M-L RMS）方向的均方根。结果显示，短注视距离降低了中风患者和对照组的M-L RMS（分别为p < 0.001，r = 0.66; p = 0.024，r = 0.43）。在对照组中，与600 cm条件相比，向下条件增加了M-L RMS（p = 0.011，r = 0.48）。与600 cm条件相比，向下条件降低了卒中患者的A-P和M-L RMS（A-P RMS：p < 0.001; r = 0.66，M-L RMS：p = 0.001; r = 0.59）。我们的研究结果表明，短的凝视距离减少了两组的姿势摇摆，向下凝视减少了它只在中风组。
Gaze distance and head flexion suppress postural sway in healthy subjects. However, the effects of these factors on stroke patients have not been fully elucidated. In this study, we aimed to evaluate the effects of gaze distance and downward gazing on postural sway in stroke patients. We examined 15 stroke patients and 14 elderly controls. Postural sway was measured in the subjects under the following 5 conditions: eyes fixed forward on a marker located 600 cm ahead (600-cm condition); eyes fixed forward on a marker located 150 cm ahead (150-cm condition); eyes fixed downward (downward condition); the subject facing straight ahead but with eyes closed (closed-forward condition); and the subject facing downward but with eyes closed (closed-downward condition). The root mean squares of the anteroposterior (A-P RMS) and the mediolateral (M-L RMS) directions were determined. The results showed that the short gaze distance decreased the M-L RMS in both the stroke patients and controls (p < 0.001, r = 0.66; p = 0.024, r = 0.43, respectively). In the control group, the downward condition increased the M-L RMS when compared with the 600-cm condition (p = 0.011, r = 0.48). The downward condition decreased the A-P and M-L RMS in the stroke patients when compared with the 600-cm condition (A-P RMS: p < 0.001; r = 0.66, M-L RMS: p = 0.001; r = 0.59). Our results showed that the short gaze distance decreased postural sway in both groups, and downward gazing decreased it only in the stroke group.