Control of center of mass motion state through cuing and decoupling of spontaneous gait parameters in level walking.
Control of center of mass motion state through cuing and decoupling of spontaneous gait parameters in level walking.
复制标题
通过水平行走中自发步态参数的提示和解耦来控制质心运动状态。
DOI：
10.1016/j.jbiomech.2010.05.015
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发表时间：
2010
影响因子：
2.4
通讯作者：
Pai,Y-C
中科院分区：
文献类型：
--
作者：
Espy,DD;Yang,F;Pai,Y-C
决定步态稳定性的重心(COM)运动状态，即其相对于支撑基座(BOS)的位置和速度，是否可以由步长和步速等全局步态参数或扩展到步频来可预测地控制？步长和步速之间的精确关系以及COM运动状态是未知的，部分原因是步长和步速之间的相互依赖，以及在自发水平行走中很难独立控制这两个参数。这项研究的目的是利用同时的视听线索来独立地操纵步长和步速，并确定随后可以控制复合位置和速度的程度。56名年轻人接受了三种步态模式中的一种的训练，在这三种步态模式中，步长和步速同时被设定为目标。结果表明，该线索能成功地将步速与步长“解耦”。虽然这种方法确实可以通过控制步态速度来可靠地控制COM速度(R2=0.97)，但操纵步长对COM位置的控制不那么精确(R2=0.60)。后一种控制似乎需要在局部节段水平上操纵额外的自由度，因此包括躯干倾斜和步长改善了对复合位置的预测(R2=0.80)。
Can the center of mass (COM) motion state, i.e., its position and velocity relative to the base of support (BOS), which dictate gait stability, be predictably controlled by the global gait parameters of step length and gait speed, or by extension, cadence? The precise relationships among step length and gait speed, and the COM motion state are unknown, partially due to the interdependence between step length and gait speed and the difficulty in independent control of both parameters during spontaneous level walking. The purposes of this study were to utilize simultaneous audio-visual cuing to independently manipulate step length and gait speed, and to determine the extent to which the COM position and velocity can be subsequently controlled. Fifty-six young adults were trained at one of the three gait patterns in which both the step length and gait speed were targeted simultaneously. The results showed that the cuing could successfully “decouple” gait speed from step length. Although this approach did yield reliable control of the COM velocity through manipulation of gait speed (R2=0.97), the manipulation of step length yielded less precise control of COM position (R2=0.60). This latter control appears to require manipulation of an additional degree-of-freedom at the local segment level, such that the inclusion of trunk inclination with step length improved the prediction of COM position (R2=0.80).
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影响因子：
2.4
作者：
Cham, R;Redfern, MS
通讯作者：
Redfern, MS
影响因子：
3.2
作者：
Roerdink, Melvyn;Lamoth, Claudine J. C.;Beek, Peter J.
通讯作者：
Beek, Peter J.
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2.4
作者：
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2.4
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Patton, JL;Pai, YC;Lee, WA
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Lee, WA
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2.4
作者：
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通讯作者：
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