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Bones of the Upper Limb: Ulna

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: 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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Related Experiment Video

Updated: Jun 12, 2026

Vascularized Composite Hand Allograft Procurement and Preparation for Distal and Proximal Forearm Allotransplantation: A Stepwise Approach

Vascularized Composite Hand Allograft Procurement and Preparation for Distal and Proximal Forearm Allotransplantation: A Stepwise Approach

Published on: May 23, 2025

[Resection of the Distal Ulna by Darrach's Method.].

M Kitka¹, V Blasko

¹Klinika úrazovej chirurgie FN, Kosice.

Acta Chirurgiae Orthopaedicae Et Traumatologiae Cechoslovaca

|May 21, 2010

Summary

Darrach

Area of Science:

Orthopedic surgery
Hand and wrist surgery

Context:

Pain, restricted wrist mobility, and deformity are common indications for surgical intervention.
Darrach's method is a surgical technique for distal ulna resection.

Purpose:

To evaluate the outcomes of Darrach's operation for distal ulna resection in patients with wrist pain, limited mobility, and deformity.

Summary:

The study reports on 7 patients who underwent distal ulna resection using Darrach's method.
The procedure was indicated for wrist pain, restricted mobility, and deformity.
Very good results were achieved with systematic post-treatment rehabilitation.

Impact:

Darrach's operation, when indicated correctly, can yield excellent outcomes for specific wrist conditions.

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Highlights the importance of comprehensive rehabilitation following the procedure.