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Bones of the Upper Limb: Radius

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...

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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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Assessment of radial pulse

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Radial System Protection

Radial System Protection

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.
In a radial system with a fault downstream of the third breaker, ideally, only the third breaker will open, isolating the fault and interrupting the load connected beyond it. The second breaker has a longer delay setting,...

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Bones of the Upper Limb: Ulna

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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 of the...

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Related Experiment Video

Updated: May 29, 2026

Development of a Novel Internal Fixation Model for Rat Radial Fractures: Fracture Healing Assessment and Dorsal Root Ganglion Isolation

Development of a Novel Internal Fixation Model for Rat Radial Fractures: Fracture Healing Assessment and Dorsal Root Ganglion Isolation

Published on: March 13, 2026

Radial side (1D) tears.

Thomas Trumble¹

¹Bellevue Bone and Joint Physicians, Affiliate Physician Overlake Hospital Medical Center, Department of Orthopaedic Surgery, 1632 116th Avenue NE #C, Bellevue, WA 98040, USA. t.trumble@comcast.net

|August 30, 2011

Summary

Radial tears of the triangular fibrocartilage complex (TFCC) disrupt wrist function. Arthroscopic TFCC repair using sutures through bone tunnels effectively restores strength and motion, enabling return to activities.

Area of Science:

Orthopedic surgery
Wrist biomechanics
Sports medicine

Background:

The triangular fibrocartilage complex (TFCC) is crucial for wrist rotation and stability.
Radial (Type 1D) TFCC tears are uncommon but significantly impair the articulation between the carpus and distal ulna.

Purpose of the Study:

To describe the arthroscopic repair of radial TFCC tears.
To evaluate the functional recovery following TFCC repair.

Main Methods:

Arthroscopic TFCC repair utilizing sutures passed through bone tunnels in the radius.
Assessment of patient outcomes including strength and range of motion.

Main Results:

Successful reattachment of the TFCC to the radius.

More Related Videos

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel

Published on: May 23, 2025

Related Experiment Videos

Last Updated: May 29, 2026

Development of a Novel Internal Fixation Model for Rat Radial Fractures: Fracture Healing Assessment and Dorsal Root Ganglion Isolation

Development of a Novel Internal Fixation Model for Rat Radial Fractures: Fracture Healing Assessment and Dorsal Root Ganglion Isolation

Published on: March 13, 2026

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel

Published on: May 23, 2025

Significant recovery of wrist strength and range of motion observed post-procedure.

Conclusions:

Arthroscopic TFCC repair is an effective treatment for radial TFCC tears.
The procedure facilitates patient return to work and sports activities with restored function.