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Related Concept Videos

Functional Classification of Joints01:09

Functional Classification of Joints

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Functional Classification of Joints
The functional classification of joints is determined by the amount of mobility between the adjacent bones. Joints are functionally classified as a synarthrosis or immobile joint, an amphiarthrosis or slightly moveable joint, or as a diarthrosis, a freely moveable joint. Fibrous and cartilaginous joints can be functionally classified as either synarthroses  or amphiarthroses, whereas all synovial joints are classified as diarthroses.
Synarthrosis
An...
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The muscles of the forearm that move the wrist, hand, and digits are numerous and diverse. They can be classified into two groups based on their location and function — the anterior and posterior compartment muscles.
Anterior Compartment
The anterior compartment muscles originate from the humerus. They primarily function as flexors and are also known as flexor muscles. They typically insert on the carpals, metacarpals, and phalanges. The superficial layer includes the flexor carpi...
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Structural Joints: Cartilaginous Joints01:17

Structural Joints: Cartilaginous Joints

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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...
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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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Structural Classification of Joints01:20

Structural Classification of Joints

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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...
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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.
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Metacarpal Small Incision for Carpal Tunnel Syndrome
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Rare carpometacarpal dislocations.

M Lefere1, B Dallaudière1, P Omoumi1

  • 1CHU de Nîmes, Department of Radiology, 4, rue du Professeur-Robert-Debré, 30029 Nîmes, France.

Orthopaedics & Traumatology, Surgery & Research : OTSR
|May 24, 2016
PubMed
Summary
This summary is machine-generated.

Posttraumatic wrist dislocations, including rare carpometacarpal (CMC) injuries, require prompt evaluation. This article offers a systematic radiologic approach for diagnosing these high-energy trauma-related wrist instabilities.

Keywords:
ArthritisCarpometacarpalDislocationTraumatismWrist

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Area of Science:

  • Orthopedic Surgery
  • Radiology
  • Trauma Management

Background:

  • Posttraumatic carpal and carpometacarpal dislocations are diverse injuries from high-energy wrist trauma.
  • Perilunate injuries are common carpal dislocations, often caused by hyperextension.
  • Other carpal dislocations and carpometacarpal (CMC) dislocations are rare and have varied mechanisms.

Observation:

  • Carpometacarpal (CMC) dislocations can affect single or multiple joints.
  • These injuries can lead to significant wrist instability if not treated promptly.
  • The study presents a systematic radiologic approach for evaluating wrist injuries.

Findings:

  • The article details a systematic radiologic approach for assessing wrist injuries.
  • Two acute cases of rare carpometacarpal dislocations are presented.
  • This approach aids in identifying diverse posttraumatic wrist dislocations.

Implications:

  • A structured radiologic evaluation is crucial for diagnosing rare wrist dislocations.
  • Prompt identification and treatment of CMC dislocations are vital for preventing wrist instability.
  • This systematic approach enhances the management of complex posttraumatic wrist injuries.