Multi-segmental thoracic spine kinematics measured dynamically in the young and elderly during flexion |
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| Affiliation: | 1. Institute for Biomechanics, ETH Zurich, Zurich, Switzerland;2. Schulthess Clinic, Zurich, Switzerland;1. Zurich University of Applied Sciences, Department of Health, Institute of Physiotherapy, Technikumstrasse 71, 8400 Winterthur, Switzerland;2. University of Tampere, School of Medicine, Kalevantie 4, 33014 University of Tampere, Finland;3. University of Eastern Finland, Department of Applied Physics, P.O. Box 1627, 70211 Kuopio, Finland;4. UKK Institute for Health Promotion Research, Kaupinpuistonkatu 1, 33500 Tampere, Finland;5. Pirkanmaa Hospital District, Physical and Rehabilitation Medicine Outpatient Clinic, Box 2000, 33521 Tampere, Finland;1. Haute Ecole de Santé Vaud (HESAV)//HES-SO, University of Applied Sciences Western Switzerland, Physiotherapy Department, Lausanne, Switzerland;2. Swiss BioMotion Lab, Department of Musculoskeletal Medicine, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland;3. Institute of Microengineering, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland;1. Institute for Biomechanics, ETH Zurich, Zurich, Switzerland;2. Department of Mechanical Engineering, Sharif University of Technology, Tehran, Iran |
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| Abstract: | In contrast to the cervical and lumbar region, the normal kinematics of the thoracic spine have not been thoroughly investigated. The aim of this study was to characterize normal multi-segmental continuous motion of the whole thoracolumbar spine, during a flexion maneuver, in young and elderly subjects. Forty-two healthy volunteers were analyzed: 21 young (age = 27.00 ± 3.96) and 21 elderly (age = 70.1 ± 3.85). Spinal motion was recorded with a motion-capture system and analyzed using a 3rd order polynomial function to approximate spinal curvature throughout the motion sequence. The average motion profiles of the two age groups were characterized. Flexion timing of the thoracic region of the spine, as compared to the lumbar spine and hips, was found to be different in the two age groups (p = 0.011): a delayed/sequential motion type was observed in most of the young, whereas mostly a simultaneous motion pattern was observed in the elderly subjects. A similar trend was observed in flexion of the lower thoracic segments (p = 0.017). Differences between age groups were also found for regional and segmental displacements and velocities. The reported characterization of the thoracic spine kinematics may in the future support identification of abnormal movement or be used to improve biomechanical models of the spine. |
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| Keywords: | Thoracic spine Segmental motion Biomechanics Age groups Flexion Motion capture |
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