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Comparison of Stabilization Exercise and General Exercise on the Spinal Stability of Non-specific Low Back Pain Patients Using an EMG-based Biomechanical Model

Ghezelbash, Farshid | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46268 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Arjmand, Navid; Parnianpour, Mohamad
  7. Abstract:
  8. Low back pain is one of the musculoskeletal diseases which is an important issue for general health of society in both quality of life and costs. Most of the clinical instructions employ exercise as a clinical treatment in order to cure chronic low back pain. General and core stability exercises are of common prevalence, however, there are disputes about the effectiveness of these exercises in the literature. The aim of this study is to answer the question whether stabilizer exercise can significantly alter the stability of vertebral column in comparison with general exercises. Hence, experiments have been designed and conducted. The participants have been divided to two group. Within six weeks, the first group did general exercises while the other group did stabilizer exercises. EMG signals have been recorded from the participants at specific tasks both before and after the treatments. With the aim of comparing the treatments, coactivation parameters and stability index of patients have been calculated. Coactivation parameters have been calculated for EMG signals, force of muscles and moment of muscles. To carry out elastostatic stability analyses, a hybrid submaximal EMG driven model of lumbar spine has been developed. The aforementioned outcome measures have been compared by ANCOVA statistical tool. Finally, according to the results of this study there is no significant difference between the treatments.
    At the next step, the effects of ignoring translational degrees of freedoms (DoFs) on the results of biomechanical models have been studied. Consequently, the results of a detail nonlinear finite element model of lumbar spine (with translational DoFs) have been compared with its dual model which have spherical joints and nonlinear springs to model kinematic and passive load of motion segments. The results show that the simplification moderately affect the predicted muscle forces and spinal loads, nevertheless, the effects on stability analysis are not considerable. As a result, this simplification at the first step of this study have not affected the results
  9. Keywords:
  10. Spine ; Stability ; Electromyography ; Biomechanical Models ; Finite Element Method ; Low Back Pain ; Core Stability Excercize

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