The purpose of this study was to determine how two different types of concurrent tasks affect gait stability in patients with concussion and how balance is maintained. Fourteen individuals suffering from a grade II concussion and 14 matched controls performed a single task of level walking and two types of concurrent tasks during level walking: a discrete reaction time task and a continuous sequential question and answer task. Common gait spatial/temporal measurements, whole-body center of mass motion, and the center of pressure trajectory were recorded. Concussed individuals demonstrated differences in gait while performing single-task level walking and while being challenged with a more difficult secondary task compared to normal controls. Concussed individuals adopted a slower, more conservative gait strategy to maintain stability, but still exhibited signs of instability with center of mass deviations in the coronal plane increasing by 13% during the question and answer dual-task and 26% more than control subjects. Trends of attentional deficits were present with the question and answer task, while the reaction time task seemed to help concussed individuals be more alert to their gait and stability. Recommendations for a sensitive testing protocol of deficits following concussion are explained.

译文

这项研究的目的是确定两种不同类型的并发任务如何影响脑震荡患者的步态稳定性以及如何保持平衡。14名患有II级脑震荡的人和14名匹配的对照者在水平行走过程中执行了单一的水平行走任务和两种并发任务: 离散的反应时间任务和连续的连续问答任务。记录了常见的步态空间/时间测量,全身质心运动和压力中心轨迹。与正常对照组相比,脑震荡的个体在执行单任务水平行走时表现出步态差异,并且面临着更困难的次要任务。脑震荡的个体采取了较慢,更保守的步态策略来维持稳定,但仍表现出不稳定的迹象,在问答过程中,冠状平面的质心偏差增加了13%,并且比对照受试者26% 更多。问答任务中存在注意缺陷的趋势,而反应时间任务似乎有助于脑震荡的个体对步态和稳定性更加警惕。解释了脑震荡后缺陷的敏感测试方案的建议。

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