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Related Concept Videos

General Structure of a Vertebra01:30

General Structure of a Vertebra

A typical vertebra, with the exception of the sacrum and coccyx, consists of a body, a vertebral arch, and seven different projections termed processes. The anterior portion of the vertebrae, the body, supports about half the body’s weight. The vertebral bodies progressively increase in size and thickness from the cervical region to the lumbar region of the vertebral column. The intervertebral discs present between the bodies of adjacent vertebrae firmly unites them, forming a continuous column.
Mesh Analysis01:20

Mesh Analysis

Mesh analysis is a valuable method for simplifying circuit analysis using mesh currents as key circuit variables. Unlike nodal analysis, which focuses on determining unknown voltages, mesh analysis applies Kirchhoff's voltage law (KVL) to find unknown currents within a circuit. This method is particularly convenient in reducing the number of simultaneous equations that need to be solved.
A fundamental concept in mesh analysis is the definition of meshes and mesh currents. A mesh is a closed...
Articulations of the Vertebral Column01:28

Articulations of the Vertebral Column

In addition to being held together by the intervertebral discs, adjacent vertebrae also articulate with each other at synovial joints formed between the superior and inferior articular processes called zygapophysial joints (facet joints). These are plane joints that provide for only limited motions between the vertebrae. The orientation of the articular processes at these joints varies in different regions of the vertebral column and serves to determine the types of motions available in each...
Spinal Cord: Cross-sectional Anatomy01:16

Spinal Cord: Cross-sectional Anatomy

The cross-sectional anatomy of the spinal cord offers a detailed view of its complex structure and function within the central nervous system. At the core of the spinal cord lies the gray matter, characterized by its butterfly or "H"-shaped appearance in cross-section. This central region is enveloped by white matter, with the overall structure divided into symmetrical halves by the dorsal median sulcus and the ventral median fissure.
Gray Matter and its Components
Central to the gray matter is...
Virtual Work for a System of Connected Rigid Bodies01:06

Virtual Work for a System of Connected Rigid Bodies

Virtual work is a powerful method used to solve problems involving several connected rigid bodies. When the system is in equilibrium, virtual work is zero. This allows the calculation of the resulting forces when a system undergoes a virtual displacement. When attempting to analyze such a system, first, use a free-body diagram, where an independent coordinate represents the configuration of the links, and mark its deflected position resulting from the positive virtual displacement.
Next,...
Structural Joints: Cartilaginous Joints01:17

Structural Joints: Cartilaginous Joints

As the name indicates, at a cartilaginous joint, the adjacent bones are united by cartilage, a tough but flexible type of connective tissue. Unlike synovial joints, these types of joints lack a joint cavity and involve bones joined together by either hyaline cartilage or fibrocartilage.
There are two types of cartilaginous joints:
Synchondrosis
A synchondrosis ("joined by cartilage") is a cartilaginous joint where bones are connected by hyaline cartilage. Synchondrosis may be temporary or...

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Related Experiment Video

Updated: Jun 23, 2026

Construction of a Realistic, Whole-Body, Three-Dimensional Equine Skeletal Model using Computed Tomography Data
11:09

Construction of a Realistic, Whole-Body, Three-Dimensional Equine Skeletal Model using Computed Tomography Data

Published on: February 25, 2021

An interactive multiblock approach to meshing the spine.

Nicole A Kallemeyn1, Srinivas C Tadepalli, Kiran H Shivanna

  • 1The University of Iowa, Iowa City, IA 52242, USA.

Computer Methods and Programs in Biomedicine
|April 28, 2009
PubMed
Summary
This summary is machine-generated.

Creating subject-specific finite element (FE) models of the spine is challenging. This study introduces new mesh generation methods to simplify and speed up the creation of all-hexahedral FE models for spine biomechanics research.

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3D Modeling of Dendritic Spines with Synaptic Plasticity
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Construction of a Realistic, Whole-Body, Three-Dimensional Equine Skeletal Model using Computed Tomography Data
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Construction of a Realistic, Whole-Body, Three-Dimensional Equine Skeletal Model using Computed Tomography Data

Published on: February 25, 2021

3D Modeling of Dendritic Spines with Synaptic Plasticity
07:13

3D Modeling of Dendritic Spines with Synaptic Plasticity

Published on: May 18, 2020

Area of Science:

  • Biomechanics
  • Computational modeling
  • Spine research

Background:

  • Finite element (FE) analysis is crucial for studying spine biomechanics, complementing experimental research.
  • Individualized FE models offer clinical relevance but are limited by the complexity of spinal geometry and mesh generation.
  • Existing spine FE models vary in geometric fidelity due to differing meshing techniques.

Purpose of the Study:

  • To develop and present novel mesh generation methods for creating subject-specific all-hexahedral finite element models of the spine.
  • To reduce the effort and time required for generating complex spine FE models.
  • To enhance the utility of FE analysis in clinical spine research.

Main Methods:

  • Utilized existing multiblock techniques to devise new mesh generation strategies.
  • Developed methods specifically for creating all-hexahedral finite element meshes.
  • Applied the techniques to generate a C4-C5 functional spinal unit model.

Main Results:

  • Successfully demonstrated mesh generation techniques for subject-specific spine FE models.
  • Created an all-hexahedral finite element model of a C4-C5 functional spinal unit.
  • Validated the model by comparing simulated motions and vertebral strains with existing literature data.

Conclusions:

  • The proposed mesh generation methods simplify and accelerate the creation of subject-specific all-hexahedral spine FE models.
  • These advancements can increase the accessibility and application of detailed spine biomechanical analysis.
  • The validated C4-C5 model serves as a foundation for further research in spine biomechanics and clinical applications.