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[A planar nonlinear model of the human spine]
1Wayne State University, Department of Mechanical Engineering and Neurological Surgery, Detroit, Michigan.
Biomedizinische Technik. Biomedical Engineering
|December 1, 1991
Summary
This study presents the LUSP (Lumbar Spine) computer model, a 2D mathematical representation of the human lumbar spine. It enables analysis of spinal biomechanics and load-bearing behavior, particularly for degenerative conditions.
Area of Science:
- Biomechanics
- Computational modeling
- Spinal research
Context:
- The human lumbar spine's complex biomechanical behavior is challenging to model.
- Understanding functional spinal units is key to analyzing muscle-free spine mechanics.
- Previous models may not fully capture nonlinear soft tissue properties.
Purpose:
- To derive a 2D mathematical model of the human lumbar spine.
- To develop an approximate solution using the finite element method.
- To create a computational tool (LUSP) for studying spinal kinematics and load-bearing behavior.
Summary:
- The LUSP model uses rigid bodies, springs, beams, and dampers based on Lagrange's virtual work principle.
- Nonlinear static and dynamic equations of motion are derived for a sagittally symmetrical spine.
- Realistic nonlinear stress-strain relationships for soft tissues were incorporated, supported by extensive data.
- A preprocessor and postprocessor facilitate data handling for the finite element analysis.
Impact:
- The LUSP model provides a basis for studying spinal biomechanics and load-bearing.
- Demonstrates efficiency through an orthopaedic-biomechanical study on juxta-fused lumbosacral segments.
- Offers insights into degenerative spinal phenomena using a validated computational approach.