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Related Concept Videos

Bones of the Upper Limb: Ulna01:15

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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...
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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.
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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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Spinal Nerves: Plexus I01:22

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Nerve plexuses are networks of interlacing nerves that serve as communication hubs to distribute and organize nerve action across various body regions. The nerve plexuses are organized into the cervical plexus located in the neck region, brachial plexus in the shoulder area, lumbar plexus found in the lower back, sacral plexus situated in the pelvis, and coccygeal plexus located in the coccygeal region.
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Bones of the Upper Limb: Humerus01:19

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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...
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The muscles that move the forearms can be divided into four groups: forearm flexors, forearm extensors, forearm pronators, and forearm supinators. The flexors and extensors act on the elbow joint, while the pronators and supinators act on the radioulnar joints.
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Distal Radioulnar Joint Instability.

Brandon Boyd1, Julie Adams2

  • 1Hand and Upper Extremity Fellow, Philadelphia Hand to Shoulder Center, 834 Chestnut Street, G114, Philadelphia, PA 19107, USA.

Hand Clinics
|October 4, 2021
PubMed
Summary
This summary is machine-generated.

Distal radioulnar joint instability causes wrist pain and dysfunction. Understanding its anatomy and biomechanics is key for evaluating and treating both acute and chronic conditions.

Keywords:
DRUJDRUJ InstabilityDistal radioulnar jointTFCCTriangular fibrocartilage complex

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Area of Science:

  • Orthopedics
  • Biomechanics
  • Anatomy

Background:

  • Distal radioulnar joint (DRUJ) instability is a common cause of ulnar-sided wrist pain.
  • Instability can be acute after trauma or chronic, developing over time.
  • Effective treatment requires a thorough understanding of DRUJ anatomy and stabilizing structures.

Purpose of the Study:

  • To describe the pathophysiology of DRUJ instability.
  • To detail the relevant anatomical structures.
  • To provide information on evaluation and treatment strategies.

Main Methods:

  • Literature review focusing on DRUJ anatomy, biomechanics, and instability.
  • Pathophysiological description of acute and chronic DRUJ instability.
  • Synthesis of current evaluation and treatment approaches.

Main Results:

  • DRUJ instability results from disruption of static and dynamic stabilizers.
  • Anatomical knowledge is crucial for diagnosing instability.
  • Treatment varies based on chronicity and severity.

Conclusions:

  • Accurate diagnosis and management of DRUJ instability depend on understanding its complex anatomy and biomechanics.
  • This article serves as a guide to the pathophysiology, evaluation, and treatment of DRUJ instability.