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Related Concept Videos

Bones of the Upper Limb: Radius01:09

Bones of the Upper Limb: Radius

The radius is longer of the two bones that make up the human antebrachium or forearm. At the proximal end, the radius articulates with the capitulum of the humerus and the radial notch of the ulna to form the elbow joint. At the distal end, the radius articulates with the ulna via the ulnar notch, forming the distal radioulnar joint. Distally, the radius also attaches to the carpal wrist bones (scaphoid and lunate) to form the radiocarpal joint.
The radius has a nail-shaped head, and a short...
Bones of the Upper Limb: Ulna01:15

Bones of the Upper Limb: Ulna

The ulna and radius are parallel bones of the antebrachium or the forearm. The ulna lies medially and consists of a bony tip called the olecranon process at its proximal end. This hook-like projection articulates with the olecranon fossa of the humerus and forms the "hinged" ulnohumeral part of the elbow joint. This joint facilitates forearm extension and flexion while preventing its hyperextension. Similarly, the coronoid process, another bony projection on the proximal/anterior side of the...
Bones of the Upper Limb: Humerus01:19

Bones of the Upper Limb: Humerus

The upper limb consists of the arm, forearm, wrist, and hand bones. The humerus is the single bone of the upper arm region. Proximally, it has a large, spherical, smooth head that articulates with the glenoid cavity of the scapula to form the glenohumeral or shoulder joint. The margin of the head is the anatomical neck, a residual epiphyseal plate. Laterally it extends to form bony projections called the greater tubercle and the lesser tubercle. Next to the tubercles is the surgical neck, a...
Functional Classification of Joints01:09

Functional Classification of Joints

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 immobile...
Lateralization01:28

Lateralization

Brain lateralization refers to the division of mental processes and functions between the two hemispheres of the brain, a phenomenon that optimizes neural efficiency and underpins complex abilities in humans. This specialization allows each hemisphere to perform tasks where it has a comparative advantage, facilitating more refined cognitive capabilities across different domains.
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...

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Updated: Jul 19, 2026

Reverse Total Shoulder Arthroplasty
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Reverse Total Shoulder Arthroplasty

Published on: July 5, 2011

[Congenital radial head dislocation on both sides].

K F Kuminack1, K Reising, L Schwering

  • 1Department für Orthopädie und Traumatologie, Klinikum der Albert-Ludwigs-Universität Freiburg, Hugstetter Str. 55, 79106 Freiburg i. Br., Deutschland. kerstin.kuminack@uniklinik-freiburg.de

Der Unfallchirurg
|October 24, 2006
PubMed
Summary

Traumatic and congenital radial head dislocation are rare childhood conditions that can be challenging to differentiate. Traumatic dislocations often resolve with non-surgical reduction, while congenital cases typically require no intervention.

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Last Updated: Jul 19, 2026

Reverse Total Shoulder Arthroplasty
10:10

Reverse Total Shoulder Arthroplasty

Published on: July 5, 2011

Area of Science:

  • Pediatric Orthopedics
  • Musculoskeletal Disorders
  • Radiology

Background:

  • Radial head dislocation, encompassing both traumatic and congenital types, is an infrequent pediatric condition.
  • Distinguishing between traumatic and congenital radial head dislocation can present diagnostic challenges in clinical practice.

Observation:

  • This paper details a case study of radial head dislocation in a child.
  • The study reviews literature pertaining to both traumatic and congenital radial head dislocation.

Findings:

  • Traumatic radial head dislocation in pediatric patients usually amenable to closed reduction, with open surgery rarely indicated in growing individuals.
  • Congenital radial head dislocation generally does not necessitate specific treatment, as affected children are often asymptomatic.

Implications:

  • Accurate diagnosis is crucial for appropriate management of pediatric radial head dislocations.
  • Understanding the natural history of congenital dislocation supports conservative management approaches.
  • Non-operative treatment is the standard for traumatic dislocations in skeletally immature patients.