Age, functional postural reflexes, and voluntary sway.
Age, functional postural reflexes, and voluntary sway.
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年龄、功能性姿势反射和随意摇摆。
DOI：
10.1093/geronj/44.4.b100
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
Teasdale,N
中科院分区：
文献类型：
--
作者：
Stelmach,GE;Phillips,J;DiFabio,RP;Teasdale,N
本实验考虑了姿势反射和随意运动之间的功能关系的年龄相关变化。年轻人和老年人在正常站立和自愿摇摆时接受水平扰动。肌电图活动显示：（a）老年人的姿势反射和随意运动之间的协调性较差，（B）他们在随意摇摆期间对姿势干扰的稳定反应较慢。此外，功能上重要的肌肉活动的发作不那么紧密地双边耦合，肌肉发作的模式在老年人中不那么刻板地组织。结果表明，老年人的经验，在肌肉活动的时间和顺序，并在他们的姿势反射与自愿摇摆的功能协调一些故障。
This experiment considered age-related changes in functional relationships between postural reflexes and voluntary movement. Young and older adults received horizontal perturbations during normal stance and when engaged in voluntary sway. Electromyographic activity showed that (a) older adults had poorer coordination between postural reflexes and voluntary movement, and (b) their stabilizing responses to postural disturbances during voluntary sway were slower. In addition, the onsets of activity of functionally important muscles were less tightly bilaterally coupled, and patterns of muscle onsets were less stereotypically organized in older adults. The results suggest that older adults experience some breakdown in the timing and sequencing of muscle activity and in the functional coordination of their postural reflexes with voluntary sway.