Journal article

THE EFFECTS OF INTRA-ABDOMINAL PRESSURE ON THE STABILITY AND UNLOADING OF THE SPINE

Hossein Mokhtarzadeh, Farzam Farahmand, Aboulfazl Shirazi-Adl, Navid Arjmand, Fatemeh Malekipour, Mohamad Parnianpour

JOURNAL OF MECHANICS IN MEDICINE AND BIOLOGY | WORLD SCIENTIFIC PUBL CO PTE LTD | Published : 2012

Abstract

In spite of earlier experimental and modeling studies, the relative role of the intra-abdominal pressure (IAP) in spine mechanics has remained controversial. This study employs simple analytical and finite element (FE) models of the spine and its surrounding structures to investigate the contribution of IAP to spinal loading and stability. The analytical model includes the abdominal cavity surrounded by muscles, lumbar spine, rib cage and pelvic ring. The intra-abdominal cavity and its surrounding muscles are represented by a thin deformable cylindrical membrane. Muscle activation levels are simulated by changing the Young's modulus of the membrane in the direction of muscle fibers, yielding..

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Grants

Awarded by Tehran University of Medical Sciences


Awarded by Hanyang University Research Foundation


Funding Acknowledgements

This work was partly supported by grant no. 86.197 from Tehran University of Medical Sciences, and partly by Hanyang University Research Foundation, HY-2009-N.