Relative efficiency of abdominal muscles in spine stability

Arjmand, N ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.1080/10255840802020404
  3. Publisher: 2008
  4. Abstract:
  5. Using an iterative kinematics-driven nonlinear finite element model, relative efficiency of individual abdominal muscles in spinal stability in upright standing posture was investigated. Effect of load height on stability and muscle activities was also computed under different coactivity levels in abdominal muscles. The internal oblique was the most efficient muscle (compared with the external oblique and rectus abdominus) in providing stability while generating smaller spinal loads with lower fatigue rate of muscles. As the weight was held higher, stability deteriorated requiring additional flexor-extensor activities. The stabilising efficacy of abdominal muscles diminished at higher activities. The difference in critical loads in frontal and sagittal planes computed in the absence of abdominal coactivity disappeared under prescribed coactivities suggesting an optimal system in stability. The central nervous system may settle for a less stable spine in favour of lowering the risk of injury. Findings could help introduce stability criterion in optimisation models. © 2009 Informa plc
  6. Keywords:
  7. Abdominal wall musculature ; Biological model ; Body equilibrium ; Human ; Pathophysiology ; Physiology ; Vertebra ; Abdominal Muscles ; Computer Simulation ; Humans ; Joint Instability ; Models, Biological ; Muscle Contraction ; Musculoskeletal Equilibrium ; Thoracic Vertebrae
  8. Source: Computer Methods in Biomechanics and Biomedical Engineering ; Volume 11, Issue 3 , 2008 , Pages 291-299 ; 10255842 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/10255840802020404