THE INITIATION OF NORMAL WALKING
THE INITIATION OF NORMAL WALKING
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DOI：
10.1002/mds.870090203
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发表时间：
1994-03-01
影响因子：
8.6
通讯作者：
SINHA, R
中科院分区：
文献类型：
--
作者：
ELBLE, RJ;MOODY, C;SINHA, R
下肢肌电图（EMG），地面反作用力，和身体运动进行了测量，由12名健康的成年人，年龄在20至82岁之间的轻快开始向前行走。步态启动20次，以响应视觉提示。在步态启动过程中，身体像一个灵活的倒立摆一样围绕脚踝旋转。下肢的肌肉被刻板地激活，以产生围绕脚踝的力矩，将身体推向站立脚并向前运动。所有志愿者都表现出相似的步态起始模式，这是如此可重复，计算机平均每个人的多个步骤是可能的。步态起始是一系列刻板的姿势转换，以向前一步为高潮。步态起始障碍可能是由于姿势控制、运动或其整合异常所致。
Lower extremity electromyograms (EMGs), ground reaction forces, and body motion were measured during the brisk initiation of forward walking performed by 12 healthy adults, aged 20 to 82 years. Gait was initiated 20 times in response to a visual cue. During gait initiation, the body rotated about the ankles like a flexible inverted pendulum. The muscles of the lower extremities were activated stereotypically so as to create moments of force about the ankles that propelled the body toward the stance foot and into forward motion. All volunteers exhibited similar patterns of gait initiation, which were so reproducible that computer averaging of multiple steps by each person was possible. Gait initiation is a stereotyped sequence of postural shifts that culminates in a forward step. Disturbances of gait initiation could result from abnormalities in postural control, movement, or their integration.