Trigger Finger
Trigger Finger - Related Videos
19:44
A Tactile Automated Passive-Finger Stimulator (TAPS)
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Cited by 24 •
2009
We describe a computer-controlled device for investigating the sense of touch: the Tactile Automated Passive-finger Stimulator (TAPS). We describe the components of TAPS, and show how TAPS is used to administer a two-interval forced-choice tactile grating orientation test.
09:11
Genome Editing with CompoZr Custom Zinc Finger Nucleases (ZFNs)
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Cited by 28 •
2012
The CompoZr Custom Zinc-Finger Nuclease (ZFN) Service enables precise genome editing in any organism or cell line at any locus defined by the user. This article describes the process for the design, manufacture, validation and implementation of the CompoZr Custom ZFN Service.
01:16
Muscles of the Forearm that Move the Hand and Fingers
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2026
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,...
02:19
Triggering a Closed-Loop Stimulation by Neuron Spiking Activity
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2025
This video demonstrates the operation of closed-loop stimulation in a rat with a surgically implanted device to record neural activity. Neuronal signals are first recorded and analyzed. Template waveforms are then uploaded, and parameters are defined to trigger closed-loop stimulation.
09:58
RNAi Trigger Delivery into Anopheles gambiae Pupae
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Cited by 9 •
2016
RNA interference (RNAi) is an extremely valuable tool for uncovering gene function. However, the ability to target genes using RNAi during pre-adult stages is limited in the major human malaria vector Anopheles gambiae. We describe an RNAi protocol to reduce gene function via direct injection during pupal development.
FAQs
Thickening around the A1 pulley reduces the space available for the flexor tendon to pass through. As the tendon moves, the narrowed passage increases friction and can interfere with smooth gliding. This mechanical restriction explains why movement may produce catching or snapping and why the finger can eventually remain in a bent position.
Swelling around the flexor tendon or its surrounding passage increases resistance during movement. Instead of gliding freely, the tendon encounters greater friction as the finger bends and straightens. The resulting mechanical interference may contribute to tenderness, painful motion, catching, or locking, giving clinicians useful clues when evaluating the condition.
Clinicians consider the pattern of symptoms together with tenderness and range of motion. Catching, locking, or snapping during finger movement, especially when associated with localized tenderness, helps guide the assessment. These findings allow the clinician to evaluate whether restricted motion reflects the tendon and pulley problem rather than another source of hand stiffness.
Symptoms may continue when the tendon cannot regain smooth passage through the narrowed area. Persistent or recurrent disease is clinically important because temporary improvement may not fully resolve the mechanical restriction. Assessment over time helps determine whether continued conservative care is appropriate or whether a corticosteroid injection or surgical release should be considered.
The evaluation focuses on reported catching, locking, or snapping, along with tenderness and the finger’s range of motion. Clinicians use these findings to characterize the movement problem and distinguish it from other causes of stiffness. This focused assessment also helps guide treatment selection and establish whether symptoms are persistent or recurrent.
Care may begin with activity modification or splinting to support more comfortable movement. A corticosteroid injection is another treatment option, while surgical release may be considered when disease persists or recurs. These approaches aim to reduce the functional effect of the narrowed tendon passage and restore painless finger motion.