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Related Concept Videos

Development of the Limb Synovial Joints01:07

Development of the Limb Synovial Joints

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Joints form during embryonic development in conjunction with the formation and growth of the associated bones. The embryonic tissue that gives rise to all bones, cartilage, and connective tissues of the body is called mesenchyme.
The mesenchymal stem cells differentiate into chondrocytes that form the hyaline cartilage, and later the cartilaginous model of the bone. This model further transforms into a bone. This process is known as endochondral ossification.
During development, the limbs...
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Ankle Joint01:10

Ankle Joint

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The ankle is formed by the talocrural joint (crural = leg). It consists of the articulations between the talus bone of the foot and the distal ends of the tibia and fibula of the leg. The superior aspect of the talus bone is square-shaped and has three areas of articulation. The top of the talus articulates with the inferior tibia. This is the portion of the ankle joint that carries the body weight between the leg and foot. The sides of the talus are firmly held in position by the articulations...
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Joints01:26

Joints

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Joints, also called articulations or articular surfaces, are points at which ligaments or other tissues connect adjacent bones. Joints permit movement and stability, and can be classified based on their structure or function.
Structural joint classifications are based on the material that makes up the joint as well as whether or not the joint contains a space between the bones. Joints are structurally classified as fibrous, cartilaginous, or synovial.
Fibrous Joints Are Immovable
The bones of a...
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Structural Joints: Synovial Joints01:16

Structural Joints: Synovial Joints

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Synovial joints are the most common type of joint in the body. A key structural characteristic for a synovial joint is the presence of a joint cavity. This fluid-filled space is where the articulating surfaces of the bones contact each other. Also, unlike fibrous or cartilaginous joints, the articulating bone surfaces at a synovial joint are not directly connected to each other with fibrous connective tissue or cartilage. This gives the bones of a synovial joint the ability to move smoothly...
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Method of Joints: Problem Solving I01:30

Method of Joints: Problem Solving I

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The method of joints is a commonly used technique to analyze the forces in structural trusses. The method is based on the principle of equilibrium, which assumes that the truss members are connected by frictionless pins. The forces at each joint can be determined by considering the equilibrium of the forces acting on that joint. Consider a truss structure with two forces of 20 N and 10 N acting at joints C and D, respectively. The method of joints can be used to determine the forces FCB, FDC,...
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Method of Joints: Problem Solving II01:30

Method of Joints: Problem Solving II

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Consider a truss structure with frictionless joints fixed to a wall and roller support. If a force of 150 N is applied to joint A, the forces in each member of the truss can be determined using the method of joints.
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Related Experiment Video

Updated: Apr 23, 2026

Anterior Cruciate Ligament Transection and Synovial Fluid Lavage in a Rodent Model to Study Joint Inflammation and Posttraumatic Osteoarthritis
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Anterior Cruciate Ligament Transection and Synovial Fluid Lavage in a Rodent Model to Study Joint Inflammation and Posttraumatic Osteoarthritis

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[Extensive joint problems in a child].

Myrna M M Römers1, Gijs T J van Well, Dina A Schott

  • 1Atrium Medisch Centrum Parkstad, afd. Kindergeneeskunde, Heerlen.

Nederlands Tijdschrift Voor Geneeskunde
|October 2, 2014
PubMed
Summary
This summary is machine-generated.

A young girl

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Area of Science:

  • Pediatric infectious diseases
  • Microbiology

Background:

  • Staphylococcus aureus infections commonly affect skin and nasal passages.
  • Invasive S. aureus infections can occur in healthy children, sometimes following minor trauma.
  • Panton-Valentine-leukocidin (PVL)-positive S. aureus strains are associated with severe infections.

Observation:

  • A 12-year-old girl presented with progressive joint issues after mild trauma.
  • Diagnostic workup confirmed Staphylococcus aureus infection.
  • The case highlights the potential for S. aureus to cause invasive joint infections in children.

Findings:

  • Previous trauma can increase susceptibility to pediatric septic arthritis and osteomyelitis.
  • Panton-Valentine-leukocidin (PVL)-positive S. aureus should be considered in differential diagnoses for invasive infections.
  • Underlying immune deficiencies may predispose children to severe S. aureus infections.

Implications:

  • Prompt and aggressive treatment of invasive S. aureus infections is crucial in pediatric patients.
  • Early diagnosis and management can prevent significant morbidity and mortality.
  • Considering PVL-positive S. aureus and immune status is vital for effective treatment strategies.