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Disorders of the Skeletal Muscle

Disorders of the Skeletal Muscle

The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...

The Functions of the Skeletal System

The Functions of the Skeletal System

The most apparent functions of the skeletal system are support, protection, and movement. However, bone tissue also performs several other critical metabolic functions. For one, the bone matrix acts as a reservoir for a number of minerals important to the functioning of the body, especially calcium and phosphorus. These minerals, present in the bone tissue, can be released back into the bloodstream when required. Calcium ions, for example, are essential for muscle contractions and controlling...

Classification of Bones

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...

Bone Disorders

Bone Disorders

Aging and its effect on bone remodeling is the most common cause of bone disorders. In young and healthy people, bone deposition and resorption happen at an equal rate to maintain optimal bone health.
Bone deposition is also affected by the levels of sex hormones like estrogen and testosterone that promote osteoblast activity and bone matrix synthesis. When the level of these hormones decreases due to aging, it causes a reduction in bone deposition. As a result, bone resorption by osteoclasts...

Changes in the Appendicular Skeleton with Age

Changes in the Appendicular Skeleton with Age

The upper and lower limb initially develops as a small bulge called a limb bud, which appears on the lateral side of the early embryo. The upper limb bud appears near the end of the fourth week of development, with the lower limb bud appearing shortly after.
Initially, the limb buds consist of a core of mesenchyme covered by a layer of ectoderm. The ectoderm at the end of the limb bud thickens to form a narrow crest called the apical ectodermal ridge. This ridge stimulates the underlying...

Introduction to the Skeletal System

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The skeletal system is the central framework of the body, consisting of different connective tissues: bones, cartilage, tendons, and ligaments.
Components of the Skeletal System
Bone, or osseous tissue, is a hard connective tissue that forms an internal support structure for the human body. Bones shield vulnerable organs and soft tissue from external forces. For example, the vertebral bones protect and support the spinal cord.
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Related Experiment Video

Updated: Jun 23, 2026

Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model

Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model

Published on: July 3, 2020

Generalized skeletal abnormalities.

Andrew J Watt¹, Kevin C Chung

¹Department of Surgery, Stanford University Hospitals & Clinics, Palo Alto, CA 94304, USA.

|April 22, 2009

Summary

This summary is machine-generated.

This study proposes a broad category for generalized skeletal abnormalities, encompassing diverse congenital hand differences like trigger finger and Madelung

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Last Updated: Jun 23, 2026

Skeletal Phenotype Analysis of a Conditional Stat3 Deletion Mouse Model

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Published on: July 3, 2020

Scanning Skeletal Remains for Bone Mineral Density in Forensic Contexts

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Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease

Published on: December 18, 2016

Area of Science:

Orthopedics
Genetics
Developmental Biology

Background:

Congenital differences in the hand are complex and diverse.
Existing classification systems struggle to categorize all skeletal abnormalities.
A need exists for a comprehensive classification of generalized skeletal abnormalities.

Purpose of the Study:

To propose and define a broad category for generalized skeletal abnormalities.
To include conditions that do not fit neatly into other established categories.
To present specific examples of congenital hand deformities within this category.

Main Methods:

Literature review and synthesis of existing classification schemes for skeletal abnormalities.
Identification and grouping of congenital hand deformities.
Correlation of hand deformities with generalized bone and connective tissue disorders.

Main Results:

A new category of 'generalized skeletal abnormalities' is proposed.
This category accommodates diverse and previously unclassified congenital conditions.
Examples include congenital trigger finger, congenital clasped thumb, Madelung's deformity, achondroplasia, and Marfan syndrome.

Conclusions:

The proposed category provides a framework for classifying complex skeletal abnormalities.
It aids in understanding the spectrum of congenital hand deformities.
This classification facilitates better diagnosis and management of these conditions.