Postural Control for Initiation of Lateral Step and Step-up Motions in Young Adults
Postural Control for Initiation of Lateral Step and Step-up Motions in Young Adults
复制标题
年轻人开始横向迈步和上台阶运动的姿势控制
DOI：
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发表时间：
2006
期刊：
影响因子：
--
通讯作者：
J. Yamaguchi
中科院分区：
文献类型：
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作者：
H. Tateuchi;Toshihiko Yoneda;Takahiro Tanaka;Hitoshi Kumada;Masahiro Kadota;Hiroshi Ohno;Kazunari Tanaka;J. Yamaguchi
本研究的目的是阐明在健康青年（24.3±1.8岁：mean±SD）中开始侧步和上台阶运动的姿势控制。这些任务包括横向踏步（台阶长度，10厘米和20厘米）和横向踏步动作（10厘米高的凳子；台阶长度，10厘米和20厘米）。分析的变量包括运动持续时间（体重移相和摇摆相）、压力中心（CoP）和重心（CoG）的移动、肩部和骨盆的位移和倾斜，以及两侧竖脊肌、臀中肌（GM）和长内收肌（AL）的肌电图均方根振幅。爬升任务的CoP向台阶侧移动比爬升任务大，两项任务在较长时间内均较小。在台阶任务中，重心向支撑侧移动，肩部和骨盆的位移均大于台阶任务。然而，支撑腿的GM活性在踏步任务中比在踏步任务中更大，并且当两项任务都在较长的时间内进行时，GM活性都增加了。在踏步腿中，加速任务的AL活动幅度大于步进任务，当两项任务都在较长长度时，AL活动幅度减小。上述结果表明，支撑腿的GM活性和踏行腿的AL活性控制着脑前平面CoG的移位。结果表明，GM活性的增加不依赖于台阶的高度，而依赖于台阶的长度。
The purpose of this study was to clarify the postural control of the initiation of lateral step and step-up motions in healthy young adults (24.3 ± 1.8 years: mean ± SD). The tasks involved the lateral step (step lengths, 10 cm and 20 cm) and lateral step-up motions (10-cm high stool; step lengths, 10 cm and 20 cm). The variables for analysis included motion duration (weight-shift phase and swing phase), shifts of the center of pressure (CoP) and the center of gravity (CoG), displacement and inclination of the shoulder and the pelvis, and root mean square electromyographic amplitude of the erector spinae, gluteus medius (GM) and adductor longus (AL) bilaterally. The CoP shift toward the stepping side was larger in the step-up task than in the step task, and it was smaller when both tasks were performed in the long lengths. The CoG shift toward the supporting side and the displacements of the shoulder and pelvis were larger in the step-up task than in the step task. However, the magnitude of GM activity of the supporting leg was larger in the step task than in the step-up task, and increased when both tasks were performed in the long lengths. In the stepping leg, the magnitude of AL activity was larger in the step-up task than in the step task, and decreased when both tasks were performed in the long lengths. These results suggest that GM activity of the supporting leg and AL activity of the stepping leg control the shift of CoG in the frontal plane. Our results indicate that the increase in GM activity does not depend on the height of stepping but on the length of stepping in lateral step and step-up motions.
影响因子：
2.4
作者：
Chou, LS;Kaufman, KR;Brey, RH
通讯作者：
Brey, RH
影响因子：
2.5
作者：
McGibbon, CA;Krebs, DE
通讯作者：
Krebs, DE