Differences in visual deprivation and visual interference for postural control on unstable surfaces in individuals with chronic ankle instability

doi:10.12307/2026.915

Abstract

Abstract: BACKGROUND: Postural control ability is significantly decreased in individuals with chronic ankle instability, and this decline is closely related to vision, vestibular sensation, and proprioception.
OBJECTIVE: To investigate the effects of visual conditions and support conditions on static postural control ability in individuals with chronic ankle instability.
METHODS: Twenty-six participants with chronic ankle instability were recruited. Each participant completed a single-leg stance test under three visual conditions (eyes open, stroboscopic vision, and eyes closed) and two support conditions (firm surface and foam pad). Center of pressure data were collected using a three-dimensional force platform under different test conditions. Two-way repeated measures analysis of variance was used to examine the effects of visual and support conditions on postural control ability in individuals with chronic ankle instability.
RESULTS AND CONCLUSION: (1) For the mean velocity of center of pressure displacement in the mediolateral direction, there was a significant interaction between visual and support conditions (P < 0.01). Under the same support condition, the mean velocity of displacement in the stroboscopic vision group was higher than that in the eyes-open group (P < 0.05), and the mean velocity of displacement in the eyes-closed group was higher than that in the stroboscopic vision group (P < 0.05). Under the same visual condition, the mean velocity of displacement in the foam pad support group was higher than that in the firm surface support group (P < 0.05). For the mean velocity of center of pressure displacement in the anteroposterior direction, there was also a significant interaction between visual and support conditions (P < 0.05). Under the same support condition, the mean velocity of displacement in the stroboscopic vision group was greater than that in the eyes-open group (P < 0.05), and the mean velocity of displacement in the eyes-closed group was greater than that in the stroboscopic vision group (P < 0.05). Under the eyes-closed condition, the mean velocity of displacement in the foam pad support group was greater than that in the firm surface support group (P < 0.05). (2) For the maximum displacement of the center of pressure in the mediolateral direction, there was no significant interaction between support and visual conditions (P > 0.05). On the firm surface, the maximum displacement in the stroboscopic vision group and eyes-closed group was longer than that in the eyes-open group (P < 0.05). On the foam pad, the maximum displacement in the stroboscopic vision group was longer than that in the eyes-open group (P < 0.05), and the maximum displacement in the eyes-closed group was longer than that in the stroboscopic vision group (P < 0.05). Under stroboscopic vision or eyes-closed conditions, the maximum displacement in the foam pad support group was longer than that in the firm surface support group (P < 0.05). (3) For the 95% ellipse area of center of pressure displacement, there was no significant interaction between support and visual conditions (P > 0.05). Under the same support condition, the 95% ellipse area in the stroboscopic vision group and eyes-closed group was greater than that in the eyes-open group (P < 0.05). To conclude, these findings indicate that visual interference and unstable surfaces significantly impair postural control in individuals with chronic ankle instability. Therefore, future rehabilitation programs can utilize unstable surfaces combined with stroboscopic glasses to design progressive functional rehabilitation training.

Key words: visual interference, chronic ankle instability, stroboscopic vision, postural control, functional rehabilitation

CLC Number:

Liu Mengyu, Shen Yurui, Zhao Yuting, Yang Kexin, Zhou Zhipeng, Zheng Liangliang. Differences in visual deprivation and visual interference for postural control on unstable surfaces in individuals with chronic ankle instability[J]. Chinese Journal of Tissue Engineering Research, 2026, 30(36): 9423-9428.

Figures/Tables 2

对于足底压力中心前后方向上偏移的平均速度，支撑条件和视觉之间存在交互效应(P=0.003，=0.125)。简单效应分析结果显示，相同支撑条件下，频闪视觉组偏移的平均速度大于睁眼组(P < 0.05)，闭眼组偏移的平均速度大于频闪视觉组(P < 0.05)；闭眼条件下，软垫支撑组偏移的平均速度大于平面支撑组(P=0.004)。睁眼或频闪视觉条件下，两种支撑条件对足底压力中心偏移平均速度的影响无显著差异(P=0.574，P=0.305)。 2.3 慢性踝关节不稳者足底压力中心偏移的最大位移如表2所示，对于足底压力中心内外方向偏移的最大位移，支撑条件和视觉不存在交互效应(P=0.725，=0.006)，不同视觉条件对最大位移产生显著影响(P < 0.001，=0.613)，不同支撑条件对偏移的最大位移的影响不显著(P=0.515，=0.009)；对于足底压力中心前后方向偏移的最大位移，支撑条件和视觉存在交互效应(P=0.036，=0.071)。简单效应分析的结果显示，在平面支撑下，频闪视觉组、闭眼组偏移的最大位移大于睁眼组(P < 0.05)；在软垫支撑下，频闪视觉组偏移的最大位移大于睁眼组，闭眼组偏移的最大位移大于频闪视觉组(P < 0.05)；睁眼条件下，平面支撑组和软垫支撑组偏移的最大位移比较无显著差异(P=0.252，=0.026)；频闪视觉或闭眼条件下，软垫支撑组偏移的最大位移大于平面支撑组(P=0.018，=0.108；P=0.002，=0.170)。 2.4 慢性踝关节不稳者足底压力中心偏移的95%包络面积如表3所示，对于足底压力中心偏移的95%包络面积，支撑条件和视觉不存在交互效应(P=0.595，=0.021)，不同视觉条件对足底压力中心偏移的95%包络面积的影响显著(P < 0.001，=0.452)，不同支撑条件对足底压力中心偏移的95%包络面积的影响不显著(P=0.106，=0.052)。相同支撑条件下，频闪视觉组、闭眼组偏移的95%包络面积大于睁眼组(P < 0.05)。"

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