Department of Physical Medicine and Rehabilitation, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo, 663-8501, Japan,
Exp Brain Res. 2014 Feb;232(2):535-43. doi: 10.1007/s00221-013-3762-3. Epub 2013 Nov 20.
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.
凝视距离和头部前倾可抑制健康受试者的姿势摆动。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，我们旨在评估凝视距离和向下凝视对中风患者姿势摆动的影响。我们检查了 15 名中风患者和 14 名老年对照组。在以下 5 种情况下测量受试者的姿势摆动：眼睛固定在前方，注视前方 600 厘米处的标记（600-cm 条件）；眼睛固定在前方，注视前方 150 厘米处的标记（150-cm 条件）；眼睛向下注视（向下条件）；受试者向前直视但闭眼（向前闭眼条件）；受试者向下注视但闭眼（向下闭眼条件）。确定前后方向（A-P RMS）和左右方向（M-L RMS）的均方根。结果表明，短凝视距离降低了中风患者和对照组的 M-L RMS（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，向下条件降低了中风患者的 A-P 和 M-L RMS（A-P RMS：p<0.001；r=0.66，M-L RMS：p=0.001；r=0.59）。我们的结果表明，短凝视距离降低了两组的姿势摆动，而向下凝视仅降低了中风组的姿势摆动。
