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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...

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...

Muscles of the Forearm that Move the Hand and Fingers

Muscles of the Forearm that Move the Hand and Fingers

The muscles of the forearm that move the wrist, hand, and digits are numerous and diverse. They can be classified into two groups based on their location and function — the anterior and posterior compartment muscles.
Anterior Compartment
The anterior compartment muscles originate from the humerus. They primarily function as flexors and are also known as flexor muscles. They typically insert on the carpals, metacarpals, and phalanges. The superficial layer includes the flexor carpi...

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...

Ankle Joint

Ankle Joint

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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Related Experiment Video

Updated: Mar 18, 2026

Author Spotlight: Enhancing Remote Rehabilitation with Virtual Reality and Electromyography

Author Spotlight: Enhancing Remote Rehabilitation with Virtual Reality and Electromyography

Published on: January 12, 2024

Proximal Interphalangeal Joint Extension Block Splint.

Jack Abboudi¹, Christopher M Jones¹

¹Rothman Institute, Newtown Square, PA, USA.

Hand (New York, N.Y.)

|July 9, 2016

Summary

This summary is machine-generated.

This study details a reliable proximal interphalangeal (PIP) extension block splint. The easy-to-manage design improves treatment for PIP joint injuries and post-operative care.

Keywords:

PIP dorsal block extension block finger splint splint thermoplast splint

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Area of Science:

Orthopedic surgery
Hand therapy
Biomedical engineering

Background:

Proximal interphalangeal (PIP) joint extension block splinting is a recognized treatment.
The practical application and specific designs for PIP splinting lack detailed literature.
Standardization of technique and splint design is needed.

Purpose of the Study:

To provide a step-by-step technique for constructing a reliable PIP extension block splint.
To review indications for PIP extension block splinting.
To discuss alternative PIP extension block splint designs.

Main Methods:

Detailed description of a novel PIP extension block splint construction.
Review of clinical indications for PIP joint splinting.
Comparison with existing PIP extension block splint designs.

Main Results:

The proposed PIP extension block splint is reliable and easy to reproduce.
Patients find the splint easy to manage during treatment.
The splint design offers a practical solution for PIP joint immobilization.

Conclusions:

PIP extension block splinting is effective for specific injuries and post-operative protocols.
A reliable and manageable splint design enhances patient and surgeon satisfaction.
This technique offers a valuable treatment option for PIP joint conditions.