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3D Measurements of the Thoracic and Lumbar Spine Range of Motions Using Inertial Sensors

Narimany, Mohammad | 2017

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 49906 (08)
  4. University: Sharif University of Technology
  5. Department: Mechanical Engineering
  6. Advisor(s): Arjmand, Navid
  7. Abstract:
  8. Musculoskeletal abnormalities affect joints and change their range of motion (RoM). Correcting these abnormalities thoroughly depends on the information related to the normal spine movement. Therefore, spine motion analysis can be used as an important tool to distinguish between healthy and patient individuals as well as to determine the intensity of such diseases. Additionally, existing biomechanical models need kinematics data in order to analyze spinal forces. The present study hence aims to measure 3D range of motion of thoracic and lumbar spine using inertial sensors. Their small size, portability, low weight, and relatively low cost make inertial sensors as indispensable tools in tracking body limb motion. Thoracic and lumbar spine RoM were measured by a novel method in the three anatomical planes using inertial sensors. This included forward and backward bending in the sagittal plane, to the sides in the coronal plane and twisting in the transverse plane by performing tests on 20 healthy male individuals. The average thoracic RoMs were 19.9±˚6.4 ˚in flexion, 11.7±˚3.4˚ in extension, 24.5±˚7.4˚ in left lateral bending, 26.5±˚6.1˚ in right lateral bending, 33.5±˚10.0˚ in left axial twisting, and finally 37.1±˚11.7˚ in right axial twisting. Furthermore, the average lumbar spine RoM was 55.4±˚12.4˚ in flexion, 23.4±˚10.1 ˚in extension, 16.4±˚7.2 ˚in left lateral bending, 18.3±˚5.7 ˚in right lateral bending, 7.5±˚4.5 in left axial rotation, and 9.2±˚7.3 ˚in right axial rotation. The direction of the average couple rotations in lateral bending and axial rotation movements was the opposite of the principle movement for the lumbar spine and in the movement direction for the thoracic spine
  9. Keywords:
  10. Spine ; Inertial Sensor ; Motion Range ; Human Movment Analysis ; Thoracic Spine ; Couple Rotations

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