Investigating the effect of lumbar disc herniation(LDH) on gait kinematics

Target: The aim of this paper is to investigate the effect of Lumbar disc herniation on gait kinematics. Bachground: Oxingling Kang et al. Examined ۱۶ patients with LDH and seven healthy individuals. All subjects should walk at a normal speed directly along a ۵-meter line drawn on the ground. During gait, motor gait signals and surface electromyographic (sEMG) signals were recorded simultaneously. Seven gait parameters (stride length, stride length, stride width, track, abutment phase, single phase and velocity) were extracted to assess gait. Mean square root (RMS) and median frequency (MDF) sEMG signals were extracted to assess neuromuscular function. Bivariate correlation analysis was used to examine the correlation between gait parameters and muscle activation. Patients with LDH showed decreased speed, increased muscle activation, and increased correlation between single-phase and muscle activation. LDH can lead to slower steps and increased muscle activation, which indicates a decrease in gait flexibility and an increase in energy expenditure in patients with LDH during gait. This study sheds light on abnormal gait and neuromuscular dysfunction in LDH patients. The methodology developed in this study may facilitate functional evaluation of LDH. Materials and Methods: In this study, a subject with lumbar disc herniation(LDH) with age ۴۴ years, height ۱۷۰ cm and weight ۷۵ kg was examined. In this research, using video imaging with a frequency of ۱۰۰ Hz and a resolution of ۱۰۸۰ pixels and marking on the pelvic, knee and ankle joints and using image processing software, motion image. processing was performed. The spatial position of each indicator was determined using scaling methods and the lengths, angles and range of motion of the studied members and joints were determined and analyzed using spatial geometry relationships.Result: Based on this study, it was found that the lumbar disc affects the range of motion of the hip , knee and ankle joints and causes more abnormal changes in these joints and reduces walking speed and creates problems related to this restriction. Conclusion: This complication causes the patient, in addition to causing pain in the lower back and lower limb, to have limited movement and changes in the speed and cycle of walking.

Keywords:

LDH , gait , joint