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Related Concept Videos

Somatic Spinal Reflexes01:22

Somatic Spinal Reflexes

Somatic spinal reflexes are rapid, involuntary muscular responses to external stimuli that involve the somatic musculature and the spinal cord.
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...
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,...
Disorders of the Skeletal Muscle01:28

Disorders of the Skeletal Muscle

The clinical conditions affecting the skeletal muscle tissue are broadly categorized as musculoskeletal and neuromuscular disorders.
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...
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...
Tetanus01:29

Tetanus

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Related Experiment Video

Updated: May 28, 2026

A Passive Ankle Dorsiflexion Testing System for an In Vivo Model of Overuse-induced Tendinopathy
04:37

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

The Journal of Hand Surgery, European Volume
|October 12, 2011
PubMed
Summary
This summary is machine-generated.

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.

Related Experiment Videos

Last Updated: May 28, 2026

A Passive Ankle Dorsiflexion Testing System for an In Vivo Model of Overuse-induced Tendinopathy
04:37

A Passive Ankle Dorsiflexion Testing System for an In Vivo Model of Overuse-induced Tendinopathy

Published on: March 1, 2024

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.