Hedayati Rozita, Kahrizi Sedighe, Parnianpour Mohammad, Bahrami Fariba, Kazemnejad Anushiravan, Mobini Bahram
Physical Therapy Department ofTarbiat Modares University, Neuromuscular Rehabilitation Research Center, Semnan University of Medical Science, Semnan, Iran.
Physical Therapy Department, Tarbiat Modares University, Tehran, Iran.
J Back Musculoskelet Rehabil. 2014;27(1):33-40. doi: 10.3233/BMR-130416.
Intrinsic variability is present in all actions, including repetitive tasks. The aim of this study was to evaluate the variability of anticipatory postural adjustments (APAs) of trunk muscles in participants with low back pain (LBP).
The study included 21 participants with recurrent non-specific LBP (15 men, 6 women) and 21 healthy volunteers. Standard deviation of electromyographic activity of the external oblique (EO), transverse abdominis/internal oblique (TrA/IO), and erector spinae (ES) muscles onset relative to deltoid muscle onset was recorded in 75 rapid arm flexions, and the correlation with the participants' avoidance belief (the FABQ score) and disability (the Roland-Morris Questionnaire score) was statistically analyzed.
participants with LBP exhibited less variability in timing of APAs of the TrA/IO muscle compared with the control group (P=0.047). The timing of APAs of the TrA/IO muscle was significantly correlated with the FABQ score (P=0.006). There was no significant correlation between this variable and disability (P=0.09). Decrease in variability of the timing of APA of the EO (P=0.45) and ES (P=0.6) muscles was not significant.
The variability of the postural responses of participants with LBP decreased. Restoring variability in postural control responses might be a goal in rehabilitating these patients.
包括重复性任务在内的所有动作都存在内在变异性。本研究旨在评估腰痛（LBP）患者躯干肌肉的预期姿势调整（APA）的变异性。
该研究纳入了21名复发性非特异性LBP患者（15名男性，6名女性）和21名健康志愿者。在75次快速手臂屈曲过程中，记录腹外斜肌（EO）、腹横肌/腹内斜肌（TrA/IO）和竖脊肌（ES）肌肉起始相对于三角肌起始的肌电活动标准差，并对其与参与者的回避信念（FABQ评分）和残疾程度（罗兰·莫里斯问卷评分）的相关性进行统计学分析。
与对照组相比，LBP患者TrA/IO肌肉APA的时间变异性较小（P=0.047）。TrA/IO肌肉APA的时间与FABQ评分显著相关（P=0.006）。该变量与残疾程度之间无显著相关性（P=0.09）。EO（P=0.45）和ES（P=0.6）肌肉APA时间变异性的降低不显著。
LBP患者姿势反应的变异性降低。恢复姿势控制反应的变异性可能是这些患者康复的一个目标。
