Related Experiment Video
Updated: May 28, 2026
A Passive Ankle Dorsiflexion Testing System for an In Vivo Model of Overuse-induced Tendinopathy
Published on: March 1, 2024
Trigger finger and tendinosis
A-C Lundin1, P Eliasson, P Aspenberg
1Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linkoping University, Linkoping, Sweden. annacarin.lundin@gmail.com
Abstract:
The pathogenesis of trigger finger has generally been ascribed to primary changes in the pulley. Histological examination of the affected tendons has rarely been done. We studied biopsies from tendons of trigger fingers from 29 patients and compared these to biopsies from six intact tendons. We used a modified Movin score, which describes the tendinosis of the Achilles tendon. Trigger finger tendons had a high score (14.2; SD, 2.2) consistent with tendinosis, while the controls were almost normal (2.5; SD, 1.9). This suggests that the tendon is also affected, and that trigger finger is a form of tendinosis.
Insights
Trigger finger may be caused by tendinosis, a condition affecting the tendon itself. This study found significant tendinosis in trigger finger tendons, suggesting a new understanding of the condition.
Area of Science:
- Orthopedics
- Pathology
- Musculoskeletal research
Background:
- The cause of trigger finger is often attributed to issues with the pulley system.
- Histological analysis of affected tendons in trigger finger is infrequently performed.
Purpose of the Study:
- To investigate the histological characteristics of tendons in trigger finger.
- To determine if tendinosis is a contributing factor in trigger finger pathogenesis.
Main Methods:
- Histological examination of tendon biopsies from 29 trigger finger patients.
- Comparison of biopsies with six intact control tendons.
- Application of a modified Movin score to assess tendinosis.
Main Results:
- Trigger finger tendons exhibited high scores (14.2; SD, 2.2) indicative of tendinosis.
- Control tendons showed minimal signs of tendinosis (2.5; SD, 1.9).
Conclusions:
- Trigger finger involves significant tendinosis within the affected tendon.
- The findings suggest trigger finger should be considered a form of tendinosis.
Related Concept Videos
01:22Somatic Spinal Reflexes
One of the most well-known somatic spinal reflexes is the stretch reflex, which is activated by the sudden stretching of a muscle. This reflex involves the activation of specialized sensory receptors called muscle spindles, which are located in the muscle tissue and detect changes in the length and speed of muscle contractions. When a muscle is suddenly...
01:16Muscles of the Forearm that Move the Hand and Fingers
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,...
01:28Disorders of the Skeletal Muscle
Musculoskeletal disorders
Musculoskeletal disorders involve injuries and conditions affecting the skeletal muscles and associated connective tissues. These disorders can arise from acute biomechanical stresses or chronic overuse and can occur across different age groups. Common injuries include sprains, fractures, and muscular strains, often resulting from...
01:16Muscles that Move the Forearm
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...
01:29Tetanus