Trunk Control during Gait: Walking with Wide and Narrow Step Widths Present Distinct Challenges
Trunk Control during Gait: Walking with Wide and Narrow Step Widths Present Distinct Challenges
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步态期间的躯干控制：宽步幅和窄步幅行走提出了独特的挑战
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
K. Kulig
中科院分区：
文献类型：
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作者：
H. Shih;J. Gordon;K. Kulig
躯干的主动控制对前平面步态的稳定起着重要作用。我们使用一种新的反馈系统表征了躯干控制对不同步幅的反应，并考察了宽步宽和窄步宽的不同影响，因为它们各自呈现出独特的任务需求。20名健康青年以1.25m/S的速度在跑步机上以0.33、1.67、1、1.33、1.67倍的规定步幅行走。用运动捕捉记录躯干运动学，用表面肌电信号记录双侧最长肌的活动。使用向量编码分析躯干骨盆和胸段之间的协调性。结果表明，虽然重心只在内侧方向上随台阶宽度变化，但三个平面上的躯干运动学都受到台阶宽度变化的影响。主干节段的角度偏移量仅随着横断面宽度的增加而增加。横面宽、额面窄对胸盆运动协调性的影响较大。峰最长肌激活和双侧共激活随着步幅变窄而增加。作为一项控制任务，不同步幅的行走并不是简单地从窄到宽的调整连续体。相反，缩小阶梯宽度和扩大首选宽度代表着不同的控制挑战，这些挑战以不同的方式进行管理。本研究为今后不同人群步态躯干的研究奠定了基础。
The active control of the trunk plays an important role in frontal plane gait stability. We characterized trunk control in response to different step widths using a novel feedback system and examined the different effects of wide and narrow step widths as they each present unique task demands. Twenty healthy young adults walked on a treadmill at 1.25 m/s at five prescribed step widths: 0.33, 1.67, 1, 1.33, 1.67 times preferred step width. Motion capture was used to record trunk kinematics, and surface electromyography was used to record longissimus muscle activation bilaterally. Vector coding was used to analyze coordination between pelvis and thorax segments of the trunk. Results showed that while center of mass only varied across step width in the mediolateral direction, trunk kinematics in all three planes were affected by changes in step width. Angular excursions of the trunk segments increased only with wider widths in the transverse plane. Thorax-pelvis kinematic coordination was affected more by wider widths in transverse plane and by narrower widths in the frontal plane. Peak longissimus activation and bilateral co-activation increased as step widths became narrower. As a control task, walking with varied step widths is not simply a continuum of adjustments from narrow to wide. Rather, narrowing step width and widening step width from the preferred width represent distinct control challenges that are managed in different ways. This study provides foundation for future investigations on the trunk during gait in different populations.
影响因子：
2.4
作者：
Donelan, JM;Shipman, DW;Kuo, AD
通讯作者：
Kuo, AD
影响因子：
2.4
作者：
Bauby, CE;Kuo, AD
通讯作者：
Kuo, AD
自愿更改步长或步长会影响人步行的动态稳定性。
影响因子：
2.4
作者：
Young, Patricia M. McAndrew;Dingwell, Jonathan B.
通讯作者：
Dingwell, Jonathan B.