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Effect of Lumbar and Soleus Proprioception on Kinematic Variability and Dynamic Stability of the Trunk and Center of Pressure Parameter in Healthy Individuals and Low Back Pain Patients

Shokouhyan, Mohammad Reza | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50656 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Parnianpour, Mohammad; Hoviattalab, Maryam
  7. Abstract:
  8. Low Back Pain is one of the most problems in health domain which has a high treatment costs, also has high recurrence rates. Postural stability has been introduced as a health characteristic for musculoskeletal systems. Body stability is maintained with sensory feedback data such as Eyes, Vestibular and proprioception data which are sent to brain. Prior investigations have shown that proprioception data have many disorders in lumbar area of Low Back Pain patient and this data are not sent to brain encounters so many problems for muscle activation and stability of body. Researches have been indicated that Low Back Pain patients rely on Ankle proprioception more than healthy people and less rely on back proprioception. Muscle vibration as one the most useful methods for activation of muscle proprioception has been used in this research which frequency and amplitude of vibrators sat on Hz and mm respectively lead to increase in rate of proprioception data which are sent to brain. Participants were divided to two separate groups of Healthy and Low Back Pain subjects in this investigate. All subjects did trials which one vibrator was placed on soleus muscle for each leg and two other vibrators were placed on multifidus area bilaterally and subjects were being placed on Force Plate and also vicon device recorded center of pressure data in AP and ML directions and Trunk angle respectively. Linear parameters were more in patient subjects against healthy people which recite more reliance on Ankle strategy in patient subjects which were consistent with prior researchs. RQA analysis for force plate data in both directions and also for trunk angle, demonstrated This evidence which patient subjects use more repetitive patterns against healthy subjects and it can be concluded that patient people insist more on Ankle proprioception in contrast to healthy subjects although use of Ankle strategy is not an appropriate for rough surfaces. Due to high Trend in patient subjects as a nonstationary criterion , brain of patient subjects needs more data to find the instant equilibrium point and for overcoming of this problem, it increase the Standard Deviations in both AP and ML directions. Also analysis of Short and Long Term lyapunov for COP and Trunk sagittal angle, demonstrated that LBP subjects have less stability against Healthy subjects due to non-flexible movement and less use of body joints (specially back joint). Statistical Analysis showed significant differences in most criteria which were used in this investigate. It can be used as diagnostic criteria between people which have proprioception disorders and also physiotherapists can use them to assess treatment process in rehabilitation period
  9. Keywords:
  10. Low Back Pain ; Kinematic Variation ; Posture Control ; Pressure Center ; Proprioception ; Reccurence Quantification Analysis (RQA)

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