Division of Athletic Training, School of Applied Health Sciences and Wellness, College of Health Sciences and Professions, Ohio University, Grover Center, Athens, OH, United States.
Division of Athletic Training, School of Applied Health Sciences and Wellness, College of Health Sciences and Professions, Ohio University, Grover Center, Athens, OH, United States; Ohio Musculoskeletal & Neurological Institute, Ohio University, Grover Center, Athens, OH, United States.
J Sci Med Sport. 2021 Feb;24(2):146-151. doi: 10.1016/j.jsams.2020.07.008. Epub 2020 Jul 28.
Determine the effect of visual-based motor and cognitive dual tasking on postural stability in those with anterior cruciate ligament reconstruction relative to matched controls.
Cohort study.
Fourteen volunteers with history of anterior crucaite ligament reconstruction were matched with fourteen healthy controls. Participants performed single leg balance tasks under 4 conditions: (1) single leg balance with eyes-open, (2) single leg balance while catching a ball (dual-motor), (3) single leg balance while repeating a string of numbers in reverse order after viewing them (dual-cognitive) and (4) single leg balance with eyes-closed. Participants completed several patient-reported outcomes of knee function. Mixed effects models were used to identify group differences on the center of pressure measures of ellipse area and root-mean-squared excursion (medial-lateral and anterior-posterior). The mixed models included subject pair as a random factor and group (control, anterior cruciate liagement reconstruction), balance condition (eyes-open, eyes-closed, dual-cognitive, and dual-motor), and group*condition as fixed effects. Tukey post-hoc pairwise comparisons were performed for significant interaction and main effects with an α=0.05.
A significant group by condition interaction was observed for ellipse area and medial-lateral root-mean-squared excursion. The anterior cruciate ligament reconstruction group had higher ellipse area (p=0.002, d=0.44) and medial-lateral root-mean-squared excursion (p<0.001, d=0.49).
Postural stability is greatly impaired under eyes-closed and dual-motor conditions relative to eyes-open. Anterior cruciate ligament reconstructed individuals have greater postural instability during the dual-cognitive condition that may indicate unique neural processing deficits remain following anterior cruciate ligament reconstruction.
确定与匹配对照组相比，基于视觉的运动和认知双重任务对前交叉韧带重建后患者的姿势稳定性的影响。
队列研究。
将 14 名有前交叉韧带重建病史的志愿者与 14 名健康对照者进行匹配。参与者在 4 种情况下进行单腿平衡任务：（1）睁眼单腿平衡，（2）接球时的单腿平衡（双重运动任务），（3）看完后按相反顺序重复一长串数字时的单腿平衡（双重认知任务）和（4）闭眼单腿平衡。参与者完成了几项膝关节功能的患者报告结果。使用混合效应模型确定压力中心测量椭圆面积和均方根偏差（内外侧和前后）的组间差异。混合模型包括作为随机因素的受试者对，以及组（对照组、前交叉韧带重建）、平衡条件（睁眼、闭眼、双重认知、双重运动）和组*条件作为固定效应。对于具有统计学意义的交互作用和主要效应，采用 Tukey 事后成对比较，α 值为 0.05。
椭圆面积和内外侧均方根偏差观察到显著的组*条件交互作用。前交叉韧带重建组的椭圆面积较大（p=0.002，d=0.44）和内外侧均方根偏差较大（p<0.001，d=0.49）。
与睁眼相比，闭眼和双重运动条件下的姿势稳定性大大受损。前交叉韧带重建患者在双重认知条件下的姿势稳定性更差，这可能表明前交叉韧带重建后仍然存在独特的神经处理缺陷。
