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Trunk biomechanical models based on equilibrium at a single-level violate equilibrium at other levels

Title
Trunk biomechanical models based on equilibrium at a single-level violate equilibrium at other levels
Author
Parnianpour, Mohammad
Keywords
single-level free body diagram model; kinematics-driven model; muscle forces; equilibrium; spine
Issue Date
2007-05
Publisher
SPRINGER-VERLAG
Citation
EUROPEAN SPINE JOURNAL, v. 16, No. 5, Page. 701-709
Abstract
Accurate estimation of muscle forces in various occupational tasks is critical for a reliable evaluation of spinal loads and subsequent assessment of risk of injury and management of back disorders. The majority of biomechanical models of multi-segmental spine estimate muscle forces and spinal loads based on the balance of net moments at a single level with no consideration for the equilibrium at remaining levels. This work aimed to quantify the extent of equilibrium violation and alterations in estimations when such models are performed at different levels. Results are compared with those of kinematics-driven model that satisfies equilibrium at all levels and EMG data. Regardless of the method used (optimization or EMG-assisted), single-level free body diagram models yielded estimations that substantially altered depending on the level considered (i.e., level dependency). Equilibrium of net moment was also grossly violated at remaining levels with the error increasing in more demanding tasks. These models may, however, be used to estimate spinal compression forces.
URI
https://link.springer.com/article/10.1007/s00586-006-0263-0http://repository.hanyang.ac.kr/handle/20.500.11754/106559
ISSN
0940-6719; 1432-0932
DOI
10.1007/s00586-006-0263-0
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > INDUSTRIAL AND MANAGEMENT ENGINEERING(산업경영공학과) > Articles
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