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Bones of the Upper Limb: Radius01:09

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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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Assessment of radial pulse01:11

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Radial System Protection01:23

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Radial systems employ time-delay overcurrent relays to reduce load interruptions. When a fault occurs, the nearest breaker opens first, while upstream breakers remain closed due to longer delay settings. This approach ensures minimal disruption to the rest of the system.
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Deformation in a Circular Shaft01:10

Deformation in a Circular Shaft

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One of the distinctive characteristics of circular shafts is their ability to maintain their cross-sectional integrity under torsion. In other words, each cross-section continues to exist as a flat, unaltered entity, simply rotating like a solid, rigid slab. To understand the distribution of shearing stress within such a shaft, consider a cylindrical section inside this circular shaft. This section has a length of L and a radius of R, with one end fixed. The radius of the cylindrical section is...
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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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Related Experiment Video

Updated: Aug 5, 2025

Author Spotlight: Ultrasound-Guided Needle Release Combined with Corticosteroid Injection for the Treatment of Supinator Syndrome
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[RADIAL TUNNEL SYNDROME].

Ayman Khoury1, Gil Gannot1, Amir Oron1

  • 1Department of Orthopedic Surgery, Hand Surgery Unit, Kaplan Medical Center, Rehovot, Israel.

Harefuah
|March 26, 2023
PubMed
Summary
This summary is machine-generated.

Radial tunnel syndrome (RTS) involves radial nerve entrapment in the forearm, causing pain and potential misdiagnosis. Early diagnosis through physical examination and appropriate treatment, either conservative or surgical, is crucial for managing this condition.

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Area of Science:

  • Orthopedics
  • Neurology
  • Sports Medicine

Context:

  • Radial tunnel syndrome (RTS) is a nerve entrapment disorder affecting the forearm.
  • It presents with forearm pain and can be associated with conditions like tennis elbow.
  • Potential links to repetitive computer keyboard use suggest ergonomic factors.

Purpose:

  • To elucidate the characteristics and diagnostic challenges of radial tunnel syndrome.
  • To highlight the importance of physical examination in accurate RTS diagnosis.
  • To outline current conservative and surgical treatment modalities for RTS.

Summary:

  • RTS is characterized by radial nerve compression within the forearm's supinator muscle tunnel.
  • Misdiagnosis is common due to symptom overlap and limited clinician familiarity.
  • Accurate diagnosis relies heavily on thorough physical examination.

Impact:

  • Improved diagnostic accuracy for radial tunnel syndrome.
  • Reduced instances of misdiagnosis and mistreatment.
  • Guidance on effective conservative (physiotherapy, nerve mobilization) and surgical (decompression) interventions.