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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...

Bones of the Upper Limb: Humerus

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...

Muscles that Move the Forearm

Muscles that Move the Forearm

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.
Forearm Flexors
The biceps brachii, brachialis, and brachioradialis are forearm flexors. The biceps brachii is made up of two heads. Its long head originates at the supraglenoid tubercle of the scapula, whereas that of the short head is...

Spinal Nerves: Plexus I

Spinal Nerves: Plexus I

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.
The Cervical Plexus
The cervical plexus, formed by the anterior rami of the first four...

Fractures: Bone Repair

Fractures: Bone Repair

Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...

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Related Experiment Video

Updated: May 31, 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

[Proximal ulna fractures].

S Siebenlist¹, K Schmidt-Horlohé, R Hoffmann

¹Klinikum rechts der Isar, Abteilung für Unfallchirurgie, TU München. siebenlist@uchir.me.tum.de

Zeitschrift Fur Orthopadie Und Unfallchirurgie

|June 30, 2011

Summary

This summary is machine-generated.

Proximal ulna fractures, including olecranon and Monteggia types, are common. This article details surgical treatments and discusses outcomes for these upper extremity injuries.

Related Experiment Videos

Last Updated: May 31, 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

Area of Science:

Orthopedic Surgery
Traumatology
Upper Extremity Injuries

Background:

Proximal ulna fractures represent frequent upper extremity injuries.
Injury severity spans from simple olecranon fractures to complex elbow dislocations.

Purpose of the Study:

To present relevant anatomy for proximal ulna fracture management.
To describe standard and novel surgical techniques for olecranon, Monteggia, and coronoid process fractures.
To discuss functional outcomes and complications associated with fracture treatment.

Main Methods:

Review of anatomical considerations for proximal ulna fractures.
Detailed description of surgical treatment modalities for specific fracture types (olecranon, Monteggia, coronoid process).
Analysis of functional outcomes and complication rates post-treatment.

Main Results:

Anatomical features crucial for surgical planning are outlined.
Established and emerging surgical techniques are comprehensively detailed.
Discussion encompasses the expected functional results and potential complications.

Conclusions:

Effective management of proximal ulna fractures requires understanding of relevant anatomy.
A range of surgical options exist for olecranon, Monteggia, and coronoid process fractures.
Careful consideration of functional outcomes and potential complications is essential for patient recovery.