Jove
Visualize
Contact Us
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 Concept Videos

Microtubule Instability02:17

Microtubule Instability

6.3K
Microtubules are hollow cylindrical filaments having a diameter of approximately 25 nm and a length that varies from 200 nm to 25 μm. GTP-bound tubulin subunits form αβ-heterodimers for microtubule assembly. These core building blocks interact longitudinally, polymerizing into protofilaments. The protofilaments then interact with one another through lateral bonding forces to form stable cylindrical microtubules. These cylindrical filaments are dynamic as they undergo repeated...
6.3K
piRNA - Piwi-interacting RNAs02:57

piRNA - Piwi-interacting RNAs

7.7K
PIWI-interacting RNAs, or piRNAs, are the most abundant short non-coding RNAs. More than 20,000 genes have been found in humans that code for piRNAs while only 2000 genes have been found for miRNAs. piRNAs can act at the transcriptional and post-transcriptional levels and have a vital role in silencing transposable elements present in germ cells. They are also involved in epigenetic silencing and activation. Previously, they were thought to function only in germ cells but new evidence suggests...
7.7K
In- and Out-Groups01:31

In- and Out-Groups

43.7K
People all belong to a gender, race, age, and social economic group. These groups provide a powerful source of our identity and self-esteem (Tajfel & Turner, 1979) and serve as our in-groups. An in-group is a group that we identify with or see ourselves as belonging to.
43.7K
Overview of DNA Repair02:25

Overview of DNA Repair

34.0K
In order to be passed through generations, genomic DNA must be undamaged and error-free. However, every day, DNA in a cell undergoes several thousand to a million damaging events by natural causes and external factors. Ionizing radiation such as UV rays, free radicals produced during cellular respiration, and hydrolytic damage from metabolic reactions can alter the structure of DNA. Damages caused include single-base alteration, base dimerization, chain breaks, and cross-linkage.
Chemically...
34.0K
Molecular Shapes01:18

Molecular Shapes

62.5K
Molecules have characteristic shapes that are crucial for their function. The arrangement of various electron groups around the central atom dictates their molecular geometry. Electron pairs in the valence shell of a central atom will adopt an arrangement that minimizes repulsions between the electron pairs by maximizing the distance between them. The valence electrons form either bonding pairs, located primarily between bonded atoms, or lone pairs.
Two regions of electron density in a diatomic...
62.5K
Protein Organization01:13

Protein Organization

158.8K
Overview
158.8K

You might also read

Related Articles

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

Sort by
Same author

Interdisciplinary consensus statements on imaging of scaphoid fractures.

European radiology·2026
Same author

Short-Term Follow-Up Treatment of Thumb Carpometacarpal Joint Osteoarthritis Through Total Arthroscopic Trapeziectomy with Suture-Button Suspensionplasty.

Journal of wrist surgery·2026
Same author

Arthroscopic Treatment of Longitudinal ECU Tendon Tear: Technical Description.

Techniques in hand & upper extremity surgery·2026
Same author

Arthroscopic Management of an Extremely Rare Wrist Fracture-Dislocation Pattern.

Journal of wrist surgery·2025
Same author

Arthroscopic treatment of carpal boss: Description of an intra-articular technique.

Journal of hand and microsurgery·2025
Same author

Description of Specific Portals for Extensor Carpi Ulnaris Tenoscopy: Anatomical Safety Study.

The Journal of hand surgery·2024

Related Experiment Video

Updated: Feb 15, 2026

Author Spotlight: Double Posteromedial Approach for Treating Posterior Cruciate Ligament Cysts
05:44

Author Spotlight: Double Posteromedial Approach for Treating Posterior Cruciate Ligament Cysts

Published on: October 20, 2023

1.5K

Arthroscopic Scaphoid 3D Test for Scapholunate Instability.

Fernando Corella1,2,3, Montserrat Ocampos1,2, Miguel Del Cerro2

  • 1Hand Surgery Unit, Department of Orthopedic and Trauma, Infanta Leonor University Hospital, Madrid, Spain.

Journal of Wrist Surgery
|February 1, 2018
PubMed
Summary

The arthroscopic scaphoid 3D test assesses dorsal displacement in scapholunate instability. This dynamic test helps identify dorsal scaphoid displacement, aiding diagnosis of wrist pain.

Keywords:
carpal instabilityscapholunate instabilityscapholunate ligamentwrist arthroscopy

More Related Videos

Autologous Microfractured and Purified Adipose Tissue for Arthroscopic Management of Osteochondral Lesions of the Talus
07:24

Autologous Microfractured and Purified Adipose Tissue for Arthroscopic Management of Osteochondral Lesions of the Talus

Published on: January 23, 2018

10.9K
Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

10.1K

Related Experiment Videos

Last Updated: Feb 15, 2026

Author Spotlight: Double Posteromedial Approach for Treating Posterior Cruciate Ligament Cysts
05:44

Author Spotlight: Double Posteromedial Approach for Treating Posterior Cruciate Ligament Cysts

Published on: October 20, 2023

1.5K
Autologous Microfractured and Purified Adipose Tissue for Arthroscopic Management of Osteochondral Lesions of the Talus
07:24

Autologous Microfractured and Purified Adipose Tissue for Arthroscopic Management of Osteochondral Lesions of the Talus

Published on: January 23, 2018

10.9K
Magnetically Induced Rotating Rayleigh-Taylor Instability
06:42

Magnetically Induced Rotating Rayleigh-Taylor Instability

Published on: March 3, 2017

10.1K

Area of Science:

  • Orthopedic Surgery
  • Arthroscopy
  • Wrist Biomechanics

Background:

  • Scapholunate instability often causes dorsal wrist pain due to scaphoid impingement.
  • Pain arises when the scaphoid displaces dorsally over the radial rim.
  • Pathologic dorsal displacement of the scaphoid is a key feature.

Purpose of the Study:

  • To describe the arthroscopic scaphoid 3D (dorsal, dynamic, displacement) test.
  • To evaluate a new method for diagnosing dorsal scaphoid displacement in scapholunate instability.

Main Methods:

  • The test is performed in both radiocarpal and midcarpal joints.
  • The arthroscope is positioned under the lunate (radiocarpal) or on the lunate (midcarpal).
  • Manual dorsal pressure is applied to the scaphoid tubercle to assess displacement.

Main Results:

  • A negative test shows minimal proximal row displacement.
  • A positive test reveals dorsal displacement of the scaphoid with a static lunate.
  • The test specifically evaluates volar-to-dorsal displacement.

Conclusions:

  • The arthroscopic scaphoid 3D test provides valuable information on dorsal displacement.
  • This dynamic test complements existing classifications of scapholunate instability.
  • It offers a novel approach to assessing scaphoid instability during arthroscopy.