J Orthop Sports Phys Ther. 2020 Aug;50(8):438-446. doi: 10.2519/jospt.2020.9133. Epub 2020 May 22.
To compare cross-recurrence quantification analysis measurements obtained during gait between adolescents who sustained a diagnosed concussion within 14 days of assessment and healthy adolescents.
Cross-sectional study.
Youth athletes with concussion (n = 43; mean ± SD age, 14.4 ± 2.3 years; 56% female; tested median, 7 days post concussion) and healthy controls (n = 38; age, 14.9 ± 2.0 years; 55% female) completed a single-task and dual-task gait protocol while wearing a set of inertial sensors. We used cross-recurrence quantification analysis techniques to quantify the similarity between accelerations obtained from the sensor on the dorsum of each foot. Four outcome variables were compared between groups: percent determinism, average diagonal-line length, laminarity, and trapping time.
Athletes with concussion had significantly higher percent determinism, laminarity, and trapping time than the control group in single-task and dual-task conditions (<.05). Gait patterns, when simultaneously completing a secondary cognitive task (dual task), were no different from gait patterns under a single-task condition.
Higher percent determinism, laminarity, and trapping time among athletes with concussion suggest that concussion may be associated with a more stuck and predictable gait pattern. These altered movement patterns may be one reason for underlying slower gait speeds that have been observed following concussion. .
比较在评估后 14 天内发生诊断性脑震荡的青少年与健康青少年在步态中获得的交叉复发定量分析测量值。
横断面研究。
患有脑震荡的青年运动员（n=43；平均年龄±标准差，14.4±2.3 岁；56%为女性；测试中位数为脑震荡后 7 天）和健康对照组（n=38；年龄，14.9±2.0 岁；55%为女性）在穿着一组惯性传感器的情况下完成了单任务和双任务步态方案。我们使用交叉复发定量分析技术来量化从每个脚背部传感器获得的加速度之间的相似性。在组间比较了四个结果变量：确定性百分比、平均对角线长度、层状和捕获时间。
在单任务和双任务条件下，脑震荡运动员的确定性百分比、层状和捕获时间明显高于对照组（<0.05）。当同时完成次要认知任务（双任务）时，步态模式与单任务条件下的步态模式没有不同。
脑震荡运动员的确定性百分比、层状和捕获时间较高表明，脑震荡可能与更僵硬和可预测的步态模式有关。这些运动模式的改变可能是脑震荡后观察到的潜在较慢步态速度的原因之一。
