Gaze Accuracy Differences During Single-Leg Balance Following Anterior Cruciate Ligament Reconstruction.
Gaze Accuracy Differences During Single-Leg Balance Following Anterior Cruciate Ligament Reconstruction.
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DOI：
10.1123/jsr.2020-0287
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发表时间：
2021-01
影响因子：
1.7
通讯作者：
S. Bodkin;J. Hertel;J. Hart
中科院分区：
文献类型：
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作者：
S. Bodkin;J. Hertel;J. Hart
背景 前交叉韧带重建 (ACLR) 后的个体表现出姿势稳定性和功能性运动模式的改变。据推测，遵循 ACLR 的个体可能会通过感觉适应来补偿，在活动期间更加依赖视觉机制。目前尚不清楚是否实施视觉补偿策略来维持功能任务期间的姿势稳定性。目的 与健康、积极的对照组相比，检查接受 ACLR 的个体在单腿平衡任务中的视觉凝视准确性。设计案例控制。设置 受控实验室。参与者 共有 20 人（10 名 ACLR 和 10 名健康对照）参与了该研究。数据收集和分析 视觉注视模式是在 20 秒单腿平衡试验中获得的，同时要求参与者注视呈现的目标。在固定目标任务期间，视觉目标在试验期间呈现在中心位置。移动目标任务包括一个视觉目标，该目标在 2 秒内随机移动到 9 个目标位置之一。移动目标任务的目标分为上、中、下三个级别。结果 固定目标任务显示各组之间的视觉误差没有差异 (P = .89)。移动目标任务证明了小组和目标水平之间存在显着的交互作用（F2,36 = 3.76，P = .033）。遵循 ACLR 的个体表现出较大的视觉误差，即上目标（ACLR = .70 [.44] m，健康 = 0.41 [.21] m，Cohen d = 0.83 [0.06 至 1.60]）和下目标（ACLR = .68 [.25] m，健康 = 0.33 [.16] m，Cohen d = 1.67 [0.81 至 1.60]） 2.52]）。结论 与健康个体相比，遵循 ACLR 的个体在高或低视觉刺激的设置下表现出更大的视觉误差，以保持单肢姿势稳定性。该人群可能依赖视觉输入来补偿受伤后的体感变化。
CONTEXT Individuals following anterior cruciate ligament reconstruction (ACLR) demonstrate altered postural stability and functional movement patterns. It is hypothesized that individuals following ACLR may compensate with sensory adaptations with greater reliance on visual mechanisms during activities. It is unknown if visual compensatory strategies are implemented to maintain postural stability during functional tasks. OBJECTIVE To examine visual gaze accuracy during a single-leg balance task in individuals following ACLR compared with healthy, active controls. DESIGN Case control. SETTING Controlled laboratory. PARTICIPANTS A total of 20 individuals (10 ACLR and 10 healthy controls) participated in the study. DATA COLLECTION AND ANALYSIS Visual gaze patterns were obtained during 20-second single-leg balance trials while participants were instructed to look at presented targets. During the Stationary Target Task, the visual target was presented in a central location for the duration of the trial. The Moving Target Task included a visual target that randomly moved to 1 of 9 target locations for a period of 2 seconds. Targets were stratified into superior, middle, and inferior levels for the Moving Target Task. RESULTS The Stationary Target Task demonstrated no differences in visual error between groups (P = .89). The Moving Target Task demonstrated a significant interaction between group and target level (F2,36 = 3.76, P = .033). Individuals following ACLR demonstrated greater visual error for the superior targets (ACLR = .70 [.44] m, healthy = .41 [.21] m, Cohen d = 0.83 [0.06 to 1.60]) and inferior targets (ACLR = .68 [.25] m, healthy = .33 [.16] m, Cohen d = 1.67 [0.81 to 2.52]). CONCLUSION Individuals following ACLR demonstrate greater visual error during settings of high or low visual stimuli compared with healthy individuals to maintain single-limb postural stability. This population may rely on visual input to compensate for the somatosensory changes following injury.