Wrist Extensors
Wrist Extensors - Related Videos
10:00
Physiological Recordings of High and Low Output NMJs on the Crayfish Leg Extensor Muscle
0 Views •
Cited by 13 •
2010
This article demonstrates how to conduct electrophysiological recordings of synaptic responses on the extensor muscle in the walking leg of a crayfish and how the nerve terminals are visualized to show the gross morphological differences of high- and low-output nerve terminals.
12:21
Wrist and Hand Examination
0 Views •
2015
Source: Robert E. Sallis, MD. Kaiser Permanente, Fontana, California, USA The wrist is a complex joint made up of 8 carpal bones and their numerous articulations and ligaments. Overlying the wrist are the tendons and muscles of the hand and fingers. The hand is made up of 5 metacarpal bones, and the tendons that run to the hand overlie these bones. Finally, the fingers consist of 14 phalanges with their articulations held together by collateral ligaments and volar plates. Common mechanisms of...
07:19
Simulating Fall-Induced Wrist Fractures Using a Cadaveric Human Forearm Specimen
0 Views •
2026
Source:Anthony J. Yosick1,2, Christine Massie1, Emma Knapp2, Hani A. Awad1,2,31Department of Biomedical Engineering, University of Rochester, US2Center for Musculoskeletal Research, Department of Orthopedics, University of Rochester Medical Center, USA3Department of Orthopedics, University of Rochester Medical Center, USAThe video demonstrates fall-related wrist fractures using human cadaver forearms with varying bone densities. Specimens are standardized by removing upper soft tissue,...
08:29
In vivo Measurement of Knee Extensor Muscle Function in Mice
0 Views •
Cited by 14 •
2021
Quantification of knee extensor maximal strength is imperative to understand functional adaptations to aging, disease, injury, and rehabilitation. We present a novel method to repeatedly measure in vivo knee extension isometric peak tetanic torque.
03:53
Myofiber Isolation: A Technique to Obtain Single Myofibers from Harvested Mouse Extensor Digitorum Longus (EDL) Muscle
0 Views •
2025
This video demonstrates the isolation of single myofibres from harvested murine Extensor Digitorum Longus (EDL) muscle. The isolated myofibres can be cultured to study myofiber-associated muscle stem cell activity.
FAQs
Their activity helps position the hand and maintains an effective length for the finger flexors during grasping. This coordination allows the fingers to generate useful force while the wrist remains appropriately aligned. The wrist extensors therefore contribute to both hand positioning and grip efficiency, rather than acting as isolated muscles that only produce joint movement.
The extensor carpi radialis longus, extensor carpi radialis brevis, and extensor carpi ulnaris form the main extensor group, while additional muscles assist with finger and thumb extension. Their combined activity supports positioning across the hand and wrist. Studying the group provides a broader view of coordinated movement than examining a single muscle alone.
Wrist-extensor contraction produces extension at both the radiocarpal and midcarpal joints. Considering these joints together helps explain how forearm muscle activity changes the position of the hand relative to the forearm. This joint-level perspective is important when analyzing movement, because visible wrist extension reflects coordinated action across more than one articulation.
The wrist flexors work with the extensors to stabilize the hand during movement. This coordinated activity helps maintain effective finger-flexor length, which supports grasping and other precise hand actions. The relationship illustrates why wrist function depends on balanced muscle activity rather than on extension produced by the extensor group in isolation.
Assessment can focus on wrist movement, hand positioning, grip-related function, and the coordinated behavior of the wrist extensors and flexors. Researchers may also examine how muscle function relates to overuse injuries or rehabilitation outcomes. These observations connect anatomy with biomechanics, allowing studies to consider both the movement produced and the functional demands placed on the hand.
They are relevant when examining movement, muscle function, overuse injuries, and rehabilitation of the hand and wrist. Their importance also extends to kinesiology and clinical research, where investigators connect muscle anatomy with biomechanics and functional performance. Studying these muscles can therefore support analyses of normal movement as well as conditions that affect effective gripping or precise hand control.