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Related Concept Videos

Classification of Bones01:18

Classification of Bones

The bones of the human skeletal system are of varied shapes, sizes, and functions. They can be classified based on their shape and function into four major classes: long bones, short bones, flat bones, and irregular bones. Some classifications include a fifth type, the sesamoid bones, as a separate class, whereas others categorize them under short bones.
Long and Short Bones
The appendicular skeleton, particularly the upper and lower limbs, is primarily made of long and short bones. The long...
Structural Classification of Joints01:20

Structural Classification of Joints

Joints, also known as articulations, are classified based on their structural characteristics, i.e., based on whether the articulating surfaces of the adjacent bones are directly connected by fibrous connective tissue or cartilage, or whether the articulating surfaces contact each other within a fluid-filled joint cavity. These differences serve to divide the joints of the body into three structural classifications.
A fibrous joint is where the adjacent bones are united by fibrous connective...
Vertebral Column: Regions and Curvature01:16

Vertebral Column: Regions and Curvature

The vertebral column or spine is a flexible column that supports the head, neck, and body and  allows for their movements. It also protects the spinal cord.
Regions of the Vertebral Column
In an adult, the spine is subdivided into five regions: the cervical, the thoracic, the lumbar, the sacral, and the coccygeal region. The spine initially develops as a series of 33 vertebrae; after 20 years of age, the nine bones in the sacral region, five sacral, and four coccygeal bones fuse to form the...
Three-Dimensional Analysis of Strain01:29

Three-Dimensional Analysis of Strain

Three-dimensional strain analysis is crucial for understanding how materials deform under stress, particularly in elastic, homogeneous materials. This method employs principal stress axes to simplify complex stress states into more understandable forms. Subjected to stress, a small cubic element within a material either expands or contracts along these axes, transforming into a rectangular parallelepiped. This transformation effectively illustrates the material's deformation. The principal...
Classification of Skeletal Muscle Fibers01:48

Classification of Skeletal Muscle Fibers

Skeletal muscles continuously produce ATP to provide the energy that enables muscle contractions. Skeletal muscle fibers can be categorized into three types based on differences in their contraction speed and how they produce ATP, as well as physical differences related to these factors. Most human muscles contain all three muscle fiber types, albeit in varying proportions.
Slow-Twitch Muscle Fibers
Slow oxidative, muscle fibers appear red due to large numbers of capillaries and high levels of...
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.

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Related Experiment Video

Updated: May 9, 2026

Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software
07:45

Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software

Published on: September 27, 2024

Three-dimensional spine model reconstruction using one-class SVM regularization.

Fabian Lecron, Jonathan Boisvert, Saïd Mahmoudi

    IEEE Transactions on Bio-Medical Engineering
    |July 19, 2013
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel shape model using one-class support vector machines (OCSVM) for robust 3D spine reconstruction in scoliosis patients. The OCSVM approach offers more precise and reliable results compared to traditional Gaussian-based statistical shape models.

    Related Experiment Videos

    Last Updated: May 9, 2026

    Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software
    07:45

    Dendritic Spine Quantification Using an Automatic Three-Dimensional Neuron Reconstruction Software

    Published on: September 27, 2024

    Area of Science:

    • Biomedical Engineering
    • Medical Imaging Analysis
    • Computational Anatomy

    Background:

    • Statistical shape models are crucial for medical image analysis, often relying on Gaussian distributions.
    • Conventional methods for spine reconstruction use Mahalanobis distance, which can be overly sensitive to deviations and outliers.

    Purpose of the Study:

    • To develop a novel shape model for 3D spine reconstruction in scoliosis patients.
    • To utilize one-class support vector machine (OCSVM) for improved regularization and robustness.

    Main Methods:

    • A new shape model based on kernel function similarities, leveraging one-class support vector machines (OCSVM).
    • Application of OCSVM regularization for 3D spine reconstruction, contrasting with Mahalanobis distance minimization.

    Main Results:

    • The OCSVM regularization demonstrates greater robustness and is less sensitive to landmark definition and outliers.
    • Evaluation on real patient data confirmed the proposed OCSVM model's capability for precise 3D spine reconstruction.

    Conclusions:

    • OCSVM-based shape modeling provides a more robust and accurate alternative for 3D spine reconstruction in scoliosis.
    • This method enhances reliability in medical image analysis, particularly when dealing with complex or atypical shapes.