1. Co-contraction characteristics of lumbar muscles in patients with lumbar disc herniation during different types of movement
- Author
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Wenjing Du, Lei Wang, Huihui Li, Sun Xiangjun, Olatunji Mumini Omisore, and Chen Wenmin
- Subjects
Adult ,Male ,lcsh:Medical technology ,Entropy ,Movement ,Biomedical Engineering ,Electromyography ,Lumbar vertebrae ,Biomaterials ,03 medical and health sciences ,0302 clinical medicine ,Lumbar ,medicine ,Lumbar muscle activity ,Humans ,Radiology, Nuclear Medicine and imaging ,Muscle, Skeletal ,Lumbar Vertebrae ,Radiological and Ultrasound Technology ,medicine.diagnostic_test ,business.industry ,Research ,Signal Processing, Computer-Assisted ,030229 sport sciences ,General Medicine ,Anatomy ,Middle Aged ,Co-contraction ratio ,Motor coordination ,Sample entropy ,medicine.anatomical_structure ,Lumbar spine ,lcsh:R855-855.5 ,Case-Control Studies ,Intervertebral Disc Displacement ,Motor unit recruitment ,Lumbar disc herniation ,Female ,medicine.symptom ,business ,030217 neurology & neurosurgery ,Muscle Contraction ,Muscle contraction - Abstract
Background Muscular performance is an important factor for the mechanical stability of lumbar spine in humans, in which, the co-contraction of lumbar muscles plays a key role. We hypothesized that when executing different daily living motions, the performance of the lumbar muscle co-contraction stabilization mechanism varies between patients with lumbar disc herniation (LDH) and healthy controls. Hence, in this study, co-contraction performance of lumbar muscles between patients with LDH and healthy subjects was explored to check if there are significant differences between the two groups when performing four representative movements. Methods Twenty-six LDH patients (15 females, 11 males) and a control group of twenty-eight subjects (16 females, 12 males) were recruited. Surface electromyography (EMG) signals were recorded from the external oblique, lumbar multifidus, and internal oblique/transversus abdominis muscles during the execution of four types of movement, namely: forward bending, backward bending, left lateral flexion and right lateral flexion. The acquired EMG signals were segmented, and wavelet decomposition was performed followed by reconstruction of the low-frequency components of the signal. Then, the reconstructed signals were used for further analysis. Co-contraction ratio was employed to assess muscle coordination and compare it between the LDH patients and healthy controls. The corresponding signals of the subjects in the two groups were compared to evaluate the differences in agonistic and antagonistic muscle performance during the different motions. Also, sample entropy was applied to evaluate complexity changes in lumbar muscle recruitment during the movements. Results Significant differences between the LDH and control groups were found in the studied situations (p
- Published
- 2018