Spinal loads and trunk muscles forces during level walking - A combined in vivo and in silico study on six subjects
| Autor: | Thomas Zander, Francesca Di Puccio, Rizwan Arshad, Marwan El-Rich, Hendrik Schmidt, Lorenza Angelini |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Adult
Male Shear force Level walking Trunk muscles forces Longissimus Thoracis Biophysics Biomedical Engineering Walking Models Biological Inverse dynamics Weight-Bearing Young Adult 03 medical and health sciences 0302 clinical medicine Lumbar Pressure Humans Medicine Computer Simulation Force platform Orthopedics and Sports Medicine Ground reaction force Muscle Skeletal Spine loads Lumbar Vertebrae business.industry Rehabilitation Biomechanics Torso 030229 sport sciences Anatomy Gait Biomechanical Phenomena Musculoskeletal models business 030217 neurology & neurosurgery |
| Popis: | During level walking, lumbar spine is subjected to cyclic movements and intricate loading of the spinal discs and trunk musculature. This study aimed to estimate the spinal loads (T12-S1) and trunk muscles forces during a complete gait cycle. Six men, 24-33years walk barefoot at self-selected speed (4-5km/h). 3D kinematics and ground reaction forces were recorded using a motion capturing system and two force plates, implemented in an inverse dynamic musculoskeletal model to predict the spinal loads and trunk muscles forces. Additionally, the sensitivity of the intra-abdominal pressure and lumbar segment rotational stiffness was investigated. Peak spinal loads and trunk muscle forces were between the gait instances of heel strike and toe off. In L4-L5 segment, sensitivity analysis showed that average peak compressive, antero-posterior and medio-lateral shear forces were 130-179%, 2-15% and 1-6%, with max standard deviation (±STD) of 40%, 6% and 3% of the body weight. Average peak global muscles forces were 24-55% (longissimus thoracis), 11-23% (iliocostalis thoracis), 12-16% (external oblique), 17-25% (internal oblique) and 0-8% (rectus abdominus) of body weight whereas, the average peak local muscles forces were 11-19% (longissimus lumborum), 14-31% (iliocostalis lumborum) and 12-17% (multifidus). Maximum±STD of the global and local muscles forces were 13% and 8% of the body weight. Large inter-individual differences were found in peak compressive and trunk muscles forces whereas the sensitivity analysis also showed a substantial variation. |
| Databáze: | OpenAIRE |
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