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姿势控制对外界干扰的反应:本体感觉信息改变的影响。

Postural control in response to an external perturbation: effect of altered proprioceptive information.

机构信息

Department of Physical Therapy (MC 898), University of Illinois at Chicago, 1919 West Taylor St., Chicago, IL 60612, USA.

出版信息

Exp Brain Res. 2012 Mar;217(2):197-208. doi: 10.1007/s00221-011-2986-3. Epub 2011 Dec 25.

Abstract

The purpose of the study was to investigate the role of altered proprioception on anticipatory (APAs) and compensatory (CPAs) postural adjustments and their interaction. Nine healthy adults were exposed to external perturbations induced at the shoulder level while standing with intact or altered proprioception induced by bilateral Achilles tendon vibration. Visual information was altered (eyes open or closed) in both the conditions. Electrical activity of eight trunk and leg muscles and center of pressure (COP) displacements were recorded and quantified within the time intervals typical for APAs and CPAs. The results showed that when proprioceptive information was altered in eyes-open conditions, anticipatory muscle activity was delayed. Moreover, altered proprioceptive information resulted in smaller magnitudes of compensatory muscle activity as well as smaller COP displacements after the perturbation in both eyes-open and eyes-closed conditions. The outcome of the study provides information on the interaction between APAs and CPAs in the presence of altered proprioception.

摘要

本研究旨在探讨本体感觉改变对姿势预位(APAs)和代偿性(CPAs)调整及其相互作用的影响。9 名健康成年人在站立时,通过双侧跟腱振动来改变本体感觉(完整或改变),同时在肩部水平受到外部干扰。两种情况下的视觉信息都被改变(睁眼或闭眼)。在 APAs 和 CPAs 的典型时间间隔内,记录和量化了 8 个躯干和腿部肌肉的电活动以及中心压力(COP)位移。结果表明,当睁眼条件下本体感觉信息发生改变时,预位肌肉活动会延迟。此外,在睁眼和闭眼两种情况下,当改变本体感觉信息时,代偿性肌肉活动的幅度较小,干扰后 COP 的位移也较小。本研究的结果提供了关于存在本体感觉改变时 APAs 和 CPAs 相互作用的信息。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/f634/3325787/c77d4aefb35a/nihms363377f1.jpg

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