Anticipatory postural adjustments associated with lateral and rotational perturbations during standing
Anticipatory postural adjustments associated with lateral and rotational perturbations during standing
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DOI：
10.1016/s1050-6411(00)00034-1
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发表时间：
2001-02-01
影响因子：
2.5
通讯作者：
Latash, ML
中科院分区：
文献类型：
--
作者：
Aruin, AS;Ota, T;Latash, ML
我们研究了不同的腿和躯干肌肉群的作用，在产生预期的姿势调整（APA）之前，与可预测的和自我触发的姿势扰动站立期间的横向和旋转扰动。姿势扰动是由各种操作引起的，包括用右手在身体前方或右侧伸出抓住和释放负荷，在不同方向上进行双侧快速肩部运动，以及用手抵住墙壁施加短暂的力脉冲。额状面的扰动（“侧向扰动”）与左右远端（比目鱼肌和胫骨前肌）肌肉中观察到的APA显著不对称相关;这些不对称取决于扰动的方向。两个肩膀在相反方向上的快速运动所产生的身体垂直轴的旋转扰动也与方向依赖性的不对称性在比目鱼肌的APA。然而，旋转扰动所产生的离体中线力脉冲应用程序伴随着方向依赖的不对称性在近端肌肉群，但不是在远端肌肉。我们的结论是，肌肉控制踝关节起着重要的作用，在横向和旋转扰动的补偿。丰富的肌肉参与保持垂直姿势允许控制系统使用不同的任务依赖的策略，在预期的旋转扰动的APA的生成期间。(C)2001爱思唯尔科技有限公司版权所有。
We studied the role of different leg and trunk muscle groups in the generation of anticipatory postural adjustments (APAs) prior to lateral and rotational perturbations associated with predictable and self-triggered postural perturbations during standing. Postural perturbations were induced by a variety of manipulations including catching and releasing a load with the right hand extended either in front of the body or to the right side, performing bilateral fast shoulder movements in different directions, and applying brief force pulses with a hand against the wall. Perturbations in a frontal plane ("lateral perturbations") were associated with significant asymmetries in APAs seen in the right and left distal (soleus and tibialis anterior) muscles; these asymmetries dependent on the direction of the perturbation. Rotational perturbations about the vertical axis of the body generated by fast movements of the two shoulders in the opposite directions were also associated with direction-dependent asymmetries in the APAs in soleus muscles. However, rotational perturbations generated by an off-body-midline force pulse application were accompanied by direction-dependent asymmetries in proximal muscle groups, but not in the distal muscles. We conclude that muscles controlling the ankle joint play an important role in the compensation of lateral and rotational perturbations. The abundance of muscles participating in maintaining vertical posture allows the control system to use different task-dependent strategies during the generation of APAs in anticipation of rotational perturbation. (C) 2001 Elsevier Science Ltd. All rights reserved.