Electromyographical activity of erector spinae and glutens medius muscles in patients with adolescent idiopathic scoliosis during gait

Background and Objectives: Understanding the muscle activity during gait in patients with adolescent idiopathic scoliosis [AIS] is clinically important. The objectives of this study was to analyze electrical activity of erector spinae muscles at T6 [ESj[6]X T10 [ES[t]10] and L3 [ESu] levels as well as glutens medius [GM] muscle during walking in female adolescents with and without idiopathic scoliosis

Materials and Methods: Twenty female adolescents with right thoracic scoliosis and 18 healthy adolescent control females [all 11 to 17 years old] participated in this study. An imaging system synchronized with a MA300-16 electromyography system and bipolar surfece electrodes were used to measure electrical activities of ES[t6], ESno, ESu and GM muscles during gait. Repeated measure analysis of variance and MANOVA were used for the comparisons within and between groups

Results: During the right stance phase, the activity of right ESroand left GM muscles in scoliotic patients were significantly [1.8 and 1.4 times] greater than that of control group [P=0.03]. In the left stance phase, scoliosis group showed higher activity at right and left GM muscles than control group [NX04]. In the right and left swing phase, the EMG activity of right GM and right ES[t6] muscles of scoliotic patients was respectively greater than that of controls. The right over left ratio of ES[t6] muscle activity for scoliosis group was higher than that for control group at all phases of gait cycle excqit for the right swing phase

Conclusion: AIS patients displayed greater activity in the right ESt6 and the right and left GM muscles during walking. AIS patients presented asymmetrical muscle activity in ES-ra muscle. EMG assessment during gait might have clinical importance in the detection of scoliotic curvature progression

evaluation of deficits on dynamic postural sway control and its correlation with lumbar mobility in females with chronic low back pain

Previous studies on chronic low back pain [CLBP] have addressed the biomechanical performance of trunk, including its mobility, and the static balance performance in the related population. However, the onset of low back pain is commonly linked with dynamic activities and therefore, the evaluation of the balance performance in dynamic condition would be clinically important. The objectives of this study were to assess the dynamic postural control and its relationship with trunk mobility in chronic low back pain patients. Twenty-four female patients with chronic low back pain and 24 ablebodied females, all between 25 to 45 years old, voluntarily participated in this study. Dynamic postural control, lumbar mobility and back pain were measured by a Biodex system, Schober technique and Quebec questionnaire, respectively. Multivariate analysis of variance [repeated measure] and Pearson correlation coefficient were used for data analysis [alpha < 0.05]. Chronic low back pain patients had greater dynamic postural sway [P < 0.0001]. In chronic low back pain, the function of lower limbs and the trunk's proprioception were affected. This deficit was better observed in closed eyes condition. Lumbar mobility was significantly reduced in chronic low back pain group, However there was no significant relationship between the lumbar mobility and the postural control [P < 0.001]. Chronic low back pain is associated with greater postural sway and reduced lumbar mobility. These variables are independent and should be considered in both detection and treatment process separately. More studies are sequined to determine if these parameters are primary or secondary