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Related Concept Videos

Muscles that Move the Forearm01:16

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...
Bones of the Upper Limb: Ulna01:15

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: Radius01:09

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...
Muscles of the Forearm that Move the Hand and Fingers01:16

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 radialis,...
Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...

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Related Experiment Video

Updated: May 25, 2026

Setup for the Quantitative Assessment of Motion and Muscle Activity During a Virtual Modified Box and Block Test
04:06

Setup for the Quantitative Assessment of Motion and Muscle Activity During a Virtual Modified Box and Block Test

Published on: January 12, 2024

Pronator quadratus imaging.

V Créteur1, A Madani, J-L Brasseur

  • 1Imagerie médicale, CHU Ambroise-Paré, 2 boulevard Kennedy, Mons, Belgium. viviane.creteur@skynet.be

Diagnostic and Interventional Imaging
|January 27, 2012
PubMed
Summary
This summary is machine-generated.

This review details the sonographic features of the pronator quadratus muscle. Ultrasonography offers advantages for diagnosing wrist conditions in clinical practice.

Related Experiment Videos

Last Updated: May 25, 2026

Setup for the Quantitative Assessment of Motion and Muscle Activity During a Virtual Modified Box and Block Test
04:06

Setup for the Quantitative Assessment of Motion and Muscle Activity During a Virtual Modified Box and Block Test

Published on: January 12, 2024

Area of Science:

  • Musculoskeletal imaging
  • Diagnostic ultrasonography

Background:

  • The pronator quadratus muscle is crucial for forearm pronation.
  • Understanding its sonographic appearance is vital for diagnosing wrist pathologies.

Purpose of the Study:

  • To review the sonographic characteristics of the pronator quadratus muscle.
  • To highlight the benefits of ultrasonography over other imaging techniques.
  • To outline clinical applications in wrist ultrasound examinations.

Main Methods:

  • Literature review of sonographic studies on the pronator quadratus.
  • Comparative analysis of ultrasonography with MRI and radiography.
  • Case examples illustrating clinical utility.

Main Results:

  • Detailed description of normal and abnormal sonographic findings of the pronator quadratus.
  • Ultrasonography provides real-time imaging, is cost-effective, and avoids ionizing radiation.
  • Applications include tendinopathy, tears, and space-occupying lesions.

Conclusions:

  • Ultrasonography is a valuable tool for evaluating the pronator quadratus muscle.
  • It offers distinct advantages for routine wrist examinations.
  • Familiarity with sonographic features aids in accurate diagnosis and patient management.