Journal article
Spinal muscles can create compressive follower loads in the lumbar spine in a neutral standing posture
Medical engineering & physics, Vol.33(4), pp.472-478
2011
DOI: 10.1016/j.medengphy.2010.11.014
PMID: 21163681
Abstract
The ligamentous spinal column buckles under compressive loads of even less than 100
N. Experimental results showed that under the follower load constraint, the ligamentous lumbar spine can sustain large compressive loads without buckling, while at the same time maintaining its flexibility reasonably well. The purpose of this study was to investigate the feasibility of follower loads produced by spinal muscles in the lumbar spine in a quiet standing posture. A three-dimensional static model of the lumbar spine incorporating 232 back muscles was developed and utilized to perform the optimization analysis in order to find the muscle forces, and compressive follower loads (CFLs) along optimum follower load paths (FLPs). The effect of increasing external loads on CFLs was also investigated. An optimum solution was found which is feasible for muscle forces producing minimum CFLs along the FLP located 11
mm posterior to the curve connecting the geometrical centers of the vertebral bodies. Activation of 30 muscles was found to create CFLs with zero joint moments in all intervertebral joints. CFLs increased with increasing external loads including FLP deviations from the optimum location. Our results demonstrate that spinal muscles can create CFLs in the lumbar spine in a neutral standing posture
in vivo to sustain stability. Therefore, its application in experimental and numerical studies concerning loading conditions seems to be suitable for the attainment of realistic results.
Details
- Title: Subtitle
- Spinal muscles can create compressive follower loads in the lumbar spine in a neutral standing posture
- Creators
- Kap-Soo Han - Department of Biomedical Engineering, The University of Iowa, Iowa City, IA, United StatesAntonius Rohlmann - Julius Wolff Institut, Charité – Universitätsmedizin Berlin, Berlin, GermanySeok-Jo Yang - Department of Mechatronics Engineering, Chungnam National University, Daejeon, Republic of KoreaByeong Sam Kim - Department of Biomedical Engineering, The University of Iowa, Iowa City, IA, United StatesTae-Hong Lim - Department of Biomedical Engineering, The University of Iowa, Iowa City, IA, United States
- Resource Type
- Journal article
- Publication Details
- Medical engineering & physics, Vol.33(4), pp.472-478
- Publisher
- Elsevier Ltd
- DOI
- 10.1016/j.medengphy.2010.11.014
- PMID
- 21163681
- ISSN
- 1350-4533
- eISSN
- 1873-4030
- Language
- English
- Date published
- 2011
- Academic Unit
- Roy J. Carver Department of Biomedical Engineering
- Record Identifier
- 9984064255902771
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