Influences of illusionary position perception on anticipatory postural control associated with arm flexion
Influences of illusionary position perception on anticipatory postural control associated with arm flexion
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DOI：
10.1016/s1050-6411(03)00083-x
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发表时间：
2003-12-01
影响因子：
2.5
通讯作者：
Toyama, H
中科院分区：
文献类型：
--
作者：
Fujiwara, K;Maeda, K;Toyama, H
我们使用跟腱的振动刺激，研究了幻觉对与站立姿势的受试者手臂弯曲相关的预期姿势控制的影响。在以下每种条件下进行手臂屈曲五次：（1）安静站立，（2）跟腱以 100 Hz 频率和 1.5 mm 振幅振动，在安静站立期间用止动器固定躯干，以及（3）振动期间感知的站立位置。与安静的站立位置相比，再现的位置位于脚长约20%的位置；这些立场在五项试验中没有显示出显着差异。在第一次试炼手臂时。在振动过程中屈曲时，股二头肌在三角肌前束之前大约 40 毫秒开始激活。在再现条件下观察到两块肌肉激活之间的相同时间差。随着重复振动试验，该激活时间接近安静站立条件下的值。在股二头肌和竖脊肌中，激活开始后前 50 毫秒的肌电图平均振幅在三种情况下没有显着差异。 (C) 2003 Elsevier Ltd. 保留所有权利。
We examined the effect of illusionary perception on anticipatory postural control associated with arm flexion with subjects in a standing position, using vibration stimulation of the Achilles' tendon. Arm flexion was performed five times under each of the following conditions: (1) quiet standing, (2) vibration of the Achilles' tendon at 100 Hz frequency and 1.5 mm amplitude with the trunk fixed by a stopper during quiet standing, and (3) a perceived standing position during vibration. The reproduced positions were located forward by about 20% of the foot length compared with the quiet standing position; these positions showed no significant differences among the five trials. In the first trial of arm. flexion during vibration, the biceps femoris began activating approximately 40 ms before the anterior deltoid. The same time difference between activation of the two muscles was observed in the reproduced condition. As the vibration trials were repeated, this activation timing approached the value in the quiet standing condition. In both the biceps femoris and erector spinae, the mean amplitude of electromyogram for the first 50 ms after the start of activation did not differ significantly among the three conditions. (C) 2003 Elsevier Ltd. All rights reserved.