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首页> 外文期刊>Gait & posture >Dual task effects for asymmetric stepping on a split-belt treadmill.
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Dual task effects for asymmetric stepping on a split-belt treadmill.

机译：皮带式跑步机上非对称踩踏的双重任务效果。

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摘要

Bilaterally asymmetric stepping during walking is common to a number of pathological gaits (e.g., hemiplegia, limping). In the present work, the attention level of asymmetric stepping was studied by having subjects walk on a split-belt treadmill with symmetric (2 km/h) and asymmetric (2 km/h vs 4 km/h and 2 km/h vs 6 km/h) belt speeds both with and without a dual auditory Stroop task. There was no significant change in response reaction times across walking conditions or between walking and standing. The proportion of stance phase was unchanged by the dual task during symmetric walking. Stance phase proportions, however, significantly increased during dual tasking for the limb on the faster belt for both asymmetric conditions, while they decreased for the limb on the slower belt for the most asymmetric condition. There were also small modifications to double support proportions and a main effect of dual tasking to double support proportion variability. Observed dual task changes showed interference by the cognitive task with asymmetric gait performance, suggesting that asymmetric stepping, such as seen in limping gaits, requires more attention than symmetric walking. Such attention may, in part, be due to the dynamic balance required in asymmetric limb loading and unloading.
机译：行走过程中双侧不对称的踩踏对于许多病理性步态（例如偏瘫，行）是常见的。在当前工作中，通过让受试者在对称（2 km / h）和非对称（2 km / h vs 4 km / h和2 km / h vs 6）的分裂皮带式跑步机上行走，研究了不对称踩踏的注意力水平km / h）带和不带双听Stroop任务的皮带速度。在步行条件下或步行与站立之间的反应时间没有明显变化。在对称行走过程中，双重任务不会改变姿态阶段的比例。但是，在两种不对称情况下，较快腰带上的肢体在双重任务期间，姿态阶段比例显着增加，而在最不对称情况下，较慢腰带上的肢体，姿态阶段比例显着下降。对双重支持比例也做了一些小的修改，而双重任务使双重支持比例的可变性产生了主要效果。观察到的双重任务变化表明认知任务干扰了步态，使步态不对称，这表明步态不对称（如步）比步态更需要注意。这种关注可能部分是由于不对称肢体加载和卸载所需的动态平衡。

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