Jove
Visualize
Contact Us

Related Concept Videos

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: Humerus01:19

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...
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...
The Hyoid Bone01:12

The Hyoid Bone

The hyoid bone is a small U-shaped bone located in the upper neck at the level of the inferior mandible, with its tips pointing posteriorly. It does not directly articulate with any other bone in the body. The hyoid acts as the attachment site for the tongue, the larynx, and the pharynx. It is held in position by a series of small muscles attached from above or below. These muscles help to move the hyoid up/down or forward/back in coordination with movements of the tongue, larynx, and pharynx...
The Auditory Ossicles01:11

The Auditory Ossicles

The auditory ossicles of the middle ear transmit sounds from the air as vibrations to the fluid-filled cochlea. The auditory ossicles consist of two malleus (hammer) bones, two incus (anvil) bones, and two stapes (stirrups), one on each side. These bones develop during the fetal stage and are the ones to ossify first. They are fully mature at birth and do not grow afterward.
The aptly named stapes look very much like a stirrup. The three ossicles are unique to mammals, and each plays a role in...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Injury to the Scapholunate Ligaments.

The Physician and sportsmedicine·2017
Same author

Functional outcome after proximal humeral fractures treated with hemiarthroplasty.

Canadian journal of surgery. Journal canadien de chirurgie·2008
Same author

Combined anterior cruciate ligament reconstruction and unicompartmental knee arthroplasty: surgical technique.

Orthopedics·2007
Same author

The effect of the wafer procedure on pressure in the distal radioulnar joint.

The Journal of hand surgery·2004
Same author

Autologous osteoarticular transfer from the proximal tibiofibular joint to the scaphoid and lunate facets in the treatment of severe distal radial fractures: a report of two cases.

The Journal of hand surgery·2003
Same author

Periscaphoid perilunate dislocation of the wrist : a case report.

The Journal of bone and joint surgery. American volume·2002
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Video

Updated: Jul 9, 2026

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel
08:27

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

Published on: May 23, 2025

Ulnar styloid triquetral impaction.

A Alan Giachino1, Alison I McIntyre, K James Guy

  • 1Division of Orthopaedic Surgery, University of Ottawa, Ottawa, Ontario, Canada. dralangiachino@rogers.com

Hand Surgery : an International Journal Devoted to Hand and Upper Limb Surgery and Related Research : Journal of the Asia-Pacific Federation of Societies for Surgery of the Hand
|December 22, 2007
PubMed
Summary
This summary is machine-generated.

Ulnar styloid triquetral impaction (USTI) causes ulnar wrist pain due to reduced space between the ulnar styloid and triquetrum. This study introduces a classification system for USTI, aiding diagnosis and management.

More Related Videos

Treatment with Locking Intramedullary Nailing for Intertrochanteric Fracture of the Femur Utilizing a New Awl with a Distal Positioner
04:41

Treatment with Locking Intramedullary Nailing for Intertrochanteric Fracture of the Femur Utilizing a New Awl with a Distal Positioner

Published on: June 6, 2025

Related Experiment Videos

Last Updated: Jul 9, 2026

Novel Triple-Loop Technique for Suturing TFCC Injuries without Transosseous Tunnel
08:27

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

Published on: May 23, 2025

Treatment with Locking Intramedullary Nailing for Intertrochanteric Fracture of the Femur Utilizing a New Awl with a Distal Positioner
04:41

Treatment with Locking Intramedullary Nailing for Intertrochanteric Fracture of the Femur Utilizing a New Awl with a Distal Positioner

Published on: June 6, 2025

Area of Science:

  • Orthopedics
  • Hand Surgery
  • Radiology

Background:

  • Ulnar styloid triquetral impaction (USTI) is a distinct cause of ulnar wrist pain, differentiated from ulno-carpal impaction (UCI) by localized tenderness over the ulnar styloid and specific provocative maneuvers.
  • Anatomical variations in ulnar styloid length and ulnar styloid variance contribute to the reduced space between the ulnar styloid and triquetrum, leading to USTI.

Purpose of the Study:

  • To analyze the clinical and radiographic features of patients diagnosed with USTI.
  • To introduce the concept of ulnar styloid variance and demonstrate anatomical variations.
  • To develop an etiological classification system for USTI.

Main Methods:

  • Analysis of clinical and radiographic features in 56 patients diagnosed with USTI.
  • Measurement of 1000 wrist radiographs to determine average ulnar styloid length and variance.

Main Results:

  • Development of an etiological classification system for USTI based on clinical and radiographic findings.
  • Identification of anatomical variations contributing to USTI.

Conclusions:

  • USTI etiology is often complex, and classification is clinically useful for management.
  • Recognizing USTI's clinical and radiographic features is crucial for proper patient management and preventing iatrogenic complications.