Azadinia Fatemeh, Ebrahimi-Takamjani Ismail, Kamyab Mojtaba, Asgari Morteza, Parnianpour Mohamad
Department of Orthotics and Prosthetics, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.
Department of Physical Therapy, School of Rehabilitation Sciences, Iran University of Medical Sciences, Tehran, Iran.
Arch Bone Jt Surg. 2019 Jul;7(4):360-366.
Lumbosacral orthosis (LSO) is commonly used for the treatment of back pain. The clinical and mechanical effectiveness of this device has been repeatedly investigated in several studies; however, its sensorimotor effectiveness has been rarely considered. Regarding this, the aim of the current study was to investigate the effect of a non-extensible LSO on postural stability (as a construct of sensorimotor function) in patients with nonspecific chronic low back pain (LBP).
This preliminary study was conducted on 17 patients with nonspecific chronic LBP using a single-group quasi-experimental design. Postural stability was measured while the participants were placed in a quiet standing position, under the combined conditions of base of support (rigid and foam surface), visual input (open eyes and closed eyes), and LSO (with and without orthosis).
The findings demonstrated that wearing orthosis during the most challenging postural task (i.e., blindfolded while standing on a foam surface) significantly reduced postural sway parameters related to the position and displacement of the center of pressure (COP; the sway area and sway amplitude in the anteroposterior direction; ). However, the use of this device had no significant effect on COP velocity.
As the findings of the present study indicated, the use of a non-extensible LSO decreased the COP displacement; however, it did not affect the COP velocity. Therefore, our data could not utterly support the effectiveness of non-extensible LSO on postural stability as a construct of sensorimotor function. Postural control is an appropriate indicator for assessing the global functioning of the sensorimotor system due to its dependence upon the interaction between the neural and musculoskeletal systems. Consequently, further studies are needed to elucidate the positive effects of LSO on the aspects of sensorimotor function.
腰骶矫形器（LSO）常用于治疗背痛。该装置的临床和力学有效性已在多项研究中反复得到研究；然而，其感觉运动有效性却很少被考虑。关于这一点，本研究的目的是调查不可伸展的LSO对非特异性慢性下腰痛（LBP）患者姿势稳定性（作为感觉运动功能的一个组成部分）的影响。
本初步研究采用单组准实验设计，对17例非特异性慢性LBP患者进行。在参与者处于安静站立姿势的情况下，在支撑面（刚性和泡沫表面）、视觉输入（睁眼和闭眼）以及LSO（佩戴和不佩戴矫形器）的组合条件下测量姿势稳定性。
研究结果表明，在最具挑战性的姿势任务（即蒙眼站在泡沫表面）期间佩戴矫形器，显著降低了与压力中心（COP）的位置和位移相关的姿势摆动参数（前后方向的摆动面积和摆动幅度）。然而，使用该装置对COP速度没有显著影响。
正如本研究结果所示，使用不可伸展的LSO可减少COP位移；然而，它并未影响COP速度。因此，我们的数据不能完全支持不可伸展的LSO对作为感觉运动功能组成部分的姿势稳定性的有效性。姿势控制因其依赖于神经和肌肉骨骼系统之间的相互作用，是评估感觉运动系统整体功能的一个合适指标。因此，需要进一步研究以阐明LSO对感觉运动功能各方面的积极影响。
